Lab Grown Diamond Engagement Rings
Semi-mount diamond engagement rings featuring lab-grown diamonds
Designer Style
These gorgeous lab-grown diamond engagement rings were hand-designed by our jewelry design team. So you can customize any of them as you see fit. They are priced with no center stone so you can pick the perfect stone for you. Whether it’s a diamond or gemstone, we can find it for you. For your convenience, we offer these engagement rings custom-made in a variety of metals including 14K, 18K and platinum.
Conflict-Free Diamonds
Many of our lab-grown diamond engagement rings feature lots of diamond accents for maximum eye-catching appeal at an affordable price. Because our diamonds are lab-grown there is no risk of conflict. And they are grown with less damage to the environment than natural mined diamonds.
Graduate Gemologists On Staff To Assist You
If you have questions about our lab-grown diamond engagement rings or just need help selecting the perfect stone for your engagement ring simply call 303-931.3141 for personal service from one of our staff gemologists or schedule a consultation.
Jacob wanted the perfect ring for Brittany. We worked closely with Jacob to source the perfect diamond. This amazing diamond engagement ring features a 2.37 carat oval center diamond surrounded by diamonds in the hidden halo and shank.
Showing 1–100 of 121 results
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Sale!
*14k Color Couture Collection diamond engagement ring semi-mount, holds a variety of center stones, ring size 6
Original price was: $1,680.00.$1,148.00Current price is: $1,148.00. -
Sale!
*14k Color Couture Collection white gold diamond engagement ring semi-mount with scalloped design , ring size 6
Original price was: $1,860.00.$1,240.00Current price is: $1,240.00. -
Sale!
14k Color Couture Collection 7x5mm oval diamond halo engagement ring semi-mount with split shank, ring size 6
Original price was: $1,920.00.$1,312.00Current price is: $1,312.00. -
Sale!
14k Color Couture Collection marquise diamond halo engagement ring semi-mount with diamond halo , ring size 6
Original price was: $2,025.00.$1,350.00Current price is: $1,350.00. -
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14k Color Couture Collection engagement ring semi-mount surrounded by two rows of diamonds, ring size 6
Original price was: $2,055.00.$1,404.25Current price is: $1,404.25. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount with octagon base , ring size 6
Original price was: $2,145.00.$1,430.00Current price is: $1,430.00. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount, holds a 6.5mm round center, ring size 6
Original price was: $2,100.00.$1,435.00Current price is: $1,435.00. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount, ring size 6
Original price was: $2,160.00.$1,476.00Current price is: $1,476.00. -
Sale!
14k Color Couture Collection cathedral style engagement ring semi-mount with diamond shank, holds 6.5mm round center stone, ring size 6
Original price was: $2,190.00.$1,496.50Current price is: $1,496.50. -
Sale!
18k Elite Color Couture Collection scalloped design diamond engagement ring semi-mount for 6.5mm round center, ring size 6
Original price was: $2,280.00.$1,520.00Current price is: $1,520.00. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $2,235.00.$1,527.25Current price is: $1,527.25. -
Sale!
14k Color Couture Collection 5.5mm princess cut engagement ring semi-mount, ring size 6
Original price was: $2,295.00.$1,530.00Current price is: $1,530.00. -
Sale!
14k Color Couture Collection natural diamond engagement ring semi-mount, holds a 5.5mm princess cut, ring size 6
Original price was: $2,370.00.$1,619.50Current price is: $1,619.50. -
Sale!
14k Color Couture Collection natural diamond engagement ring semi-mount, holds a 5.5mm princess cut, ring size 6
Original price was: $2,370.00.$1,619.50Current price is: $1,619.50. -
Sale!
14k Color Couture Collection natural diamond engagement ring semi-mount, holds a 5.5mm princess cut, ring size 6
Original price was: $2,370.00.$1,619.50Current price is: $1,619.50. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $2,415.00.$1,650.25Current price is: $1,650.25. -
Sale!
14k rose gold Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $2,415.00.$1,650.25Current price is: $1,650.25. -
Sale!
14k yellow gold Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $2,415.00.$1,650.25Current price is: $1,650.25. -
Sale!
18k Elite Color Couture Collection engagement ring semi-mount, holds a 7mm round center stone, ring size 6
Original price was: $2,505.00.$1,670.00Current price is: $1,670.00. -
Sale!
*14k Color Couture Collection white gold open band diamond engagement ring semi-mount, ring size 6
Original price was: $2,550.00.$1,700.00Current price is: $1,700.00. -
Sale!
18k Elite Color Couture Collection micro-pave set diamond engagement ring semi-mount, holds 6.5mm , ring size 6
Original price was: $2,550.00.$1,700.00Current price is: $1,700.00. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount, holds a 1 carat center, ring size 6
Original price was: $2,580.00.$1,720.00Current price is: $1,720.00. -
Sale!
18k Elite Color Couture Collection cathedral style engagement ring semi-mount, holds a 6.5mm round center, ring size 6
Original price was: $2,595.00.$1,730.00Current price is: $1,730.00. -
Sale!
14k Color Couture Collection 6.5mm round diamond engagement ring semi-mount with blue sapphires, ring size 6
Original price was: $2,655.00.$1,770.00Current price is: $1,770.00. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount, ring size 6
Original price was: $2,595.00.$1,773.25Current price is: $1,773.25. -
Sale!
18k Elite Color Couture Collection 1 carat princess diamond & sapphire engagement ring semi-mount, ring size 6
Original price was: $2,715.00.$1,810.00Current price is: $1,810.00. -
Sale!
14k Color Couture Collection 8x5mm pear diamond halo engagement ring semi-mount, ring size 6
Original price was: $2,667.00.$1,822.45Current price is: $1,822.45. -
Sale!
14k Color Couture Collection 1 carat princess diamond & sapphire engagement ring semi-mount, ring size 6
Original price was: $2,715.00.$1,855.25Current price is: $1,855.25. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount with delicate diamond halo , ring size 6
Original price was: $2,790.00.$1,860.00Current price is: $1,860.00. -
Sale!
18k white and rose gold Elite Color Couture Collection diamond engagement ring semi-mount with delicate diamond halo , ring size 6
Original price was: $2,790.00.$1,860.00Current price is: $1,860.00. -
Sale!
18k Elite Color Couture Collection engagement ring semi-mount with natural diamond accents, ring size 6
Original price was: $2,895.00.$1,930.00Current price is: $1,930.00. -
Sale!
18k white and rose gold Elite Color Couture Collection engagement ring semi-mount with natural diamond accents, ring size 6
Original price was: $2,895.00.$1,930.00Current price is: $1,930.00. -
Sale!
18k white and yellow gold Elite Color Couture Collection engagement ring semi-mount with natural diamond accents, ring size 6
Original price was: $2,895.00.$1,930.00Current price is: $1,930.00. -
Sale!
*14k Color Couture Collection diamond engagement ring semi-mount, ring size 6
Original price was: $2,835.00.$1,937.25Current price is: $1,937.25. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $2,955.00.$1,970.00Current price is: $1,970.00. -
Sale!
*14k Color Couture Collection cathedral style engagement ring semi-mount with diamond shank, holds 6.5mm round center stone, ring size 6
Original price was: $2,895.00.$1,978.25Current price is: $1,978.25. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, ring size 6
Original price was: $3,000.00.$2,000.00Current price is: $2,000.00. -
Sale!
18k Elite Color Couture Collection 5.5mm princess cut engagement ring semi-mount, ring size 6
Original price was: $3,060.00.$2,040.00Current price is: $2,040.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, holds a 5.5mm princess cut , ring size 6
Original price was: $3,075.00.$2,050.00Current price is: $2,050.00. -
Sale!
18k rose gold Elite Color Couture Collection diamond engagement ring semi-mount, holds a 5.5mm princess cut , ring size 6
Original price was: $3,075.00.$2,050.00Current price is: $2,050.00. -
Sale!
18k yellow gold Elite Color Couture Collection diamond engagement ring semi-mount, holds a 5.5mm princess cut , ring size 6
Original price was: $3,075.00.$2,050.00Current price is: $2,050.00. -
Sale!
18k Elite Color Couture Collection 6mm square cushion cut engagement ring semi-mount, ring size 6
Original price was: $3,060.00.$2,091.00Current price is: $2,091.00. -
Sale!
18k Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $3,165.00.$2,110.00Current price is: $2,110.00. -
Sale!
18k Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $3,165.00.$2,110.00Current price is: $2,110.00. -
Sale!
18k Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $3,165.00.$2,110.00Current price is: $2,110.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount with sapphire accents , ring size 6
Original price was: $3,240.00.$2,160.00Current price is: $2,160.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,330.00.$2,220.00Current price is: $2,220.00. -
Sale!
18k rose gold Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,330.00.$2,220.00Current price is: $2,220.00. -
Sale!
18k yellow gold Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,330.00.$2,220.00Current price is: $2,220.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, holds a 1 carat center, ring size 6
Original price was: $3,345.00.$2,230.00Current price is: $2,230.00. -
Sale!
18k Elite Color Couture Collection 7x5mm emerald cut engagement ring semi-mount with natural diamond halo, ring size 6
Original price was: $3,360.00.$2,240.00Current price is: $2,240.00. -
Sale!
18k white and rose gold Elite Color Couture Collection 7x5mm emerald cut engagement ring semi-mount with natural diamond halo, ring size 6
Original price was: $3,360.00.$2,240.00Current price is: $2,240.00. -
Sale!
18k white and yellow gold Elite Color Couture Collection 7x5mm emerald cut engagement ring semi-mount with natural diamond halo, ring size 6
Original price was: $3,360.00.$2,240.00Current price is: $2,240.00. -
Sale!
18k Elite Color Couture Collection 8x5mm pear diamond halo engagement ring semi-mount, ring size 6
Original price was: $3,360.00.$2,240.00Current price is: $2,240.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, ring size 6
Original price was: $3,405.00.$2,270.00Current price is: $2,270.00. -
Sale!
*18k Elite Color Couture Collection cathedral-style diamond engagement ring semi-mount holds peg head, ring size 6
Original price was: $3,450.00.$2,300.00Current price is: $2,300.00. -
Sale!
18k Elite Color Couture Collection cathedral style engagement ring semi-mount with diamond shank, holds 6.5mm round center stone, ring size 6
Original price was: $3,450.00.$2,300.00Current price is: $2,300.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,555.00.$2,370.00Current price is: $2,370.00. -
Sale!
18k white and rose rose gold Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,555.00.$2,370.00Current price is: $2,370.00. -
Sale!
18k yellow gold Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,555.00.$2,370.00Current price is: $2,370.00. -
Sale!
18k Elite Color Couture Collection engagement ring semi-mount surrounded by two rows of diamonds, ring size 6
Original price was: $3,570.00.$2,380.00Current price is: $2,380.00. -
Sale!
14k white and rose rose gold Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,555.00.$2,429.25Current price is: $2,429.25. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,690.00.$2,460.00Current price is: $2,460.00. -
Sale!
*14k Color Couture Collection cathedral style engagement ring semi-mount, ring size 6
Original price was: $3,615.00.$2,470.25Current price is: $2,470.25. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount holds 6.5mm round center, ring size 6
Original price was: $3,750.00.$2,500.00Current price is: $2,500.00. -
Sale!
14k Color Couture Collection diamond engagement ring semi-mount holds 5.5mm princess cut , ring size 6
Original price was: $3,810.00.$2,603.50Current price is: $2,603.50. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, holds square 6mm cushion, ring size 6
Original price was: $3,945.00.$2,630.00Current price is: $2,630.00. -
Sale!
18k white and rose gold Elite Color Couture Collection diamond engagement ring semi-mount, holds square 6mm cushion, ring size 6
Original price was: $3,945.00.$2,630.00Current price is: $2,630.00. -
Sale!
18k white and yellow gold Elite Color Couture Collection diamond engagement ring semi-mount, holds square 6mm cushion, ring size 6
Original price was: $3,945.00.$2,630.00Current price is: $2,630.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, holds a 6mm cushion center, ring size 6
Original price was: $3,990.00.$2,660.00Current price is: $2,660.00. -
Sale!
18k rose gold Elite Color Couture Collection diamond engagement ring semi-mount, holds a 6mm cushion center, ring size 6
Original price was: $3,990.00.$2,660.00Current price is: $2,660.00. -
Sale!
18k yellow gold Elite Color Couture Collection diamond engagement ring semi-mount, holds a 6mm cushion center, ring size 6
Original price was: $3,990.00.$2,660.00Current price is: $2,660.00. -
Sale!
18k Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $4,050.00.$2,700.00Current price is: $2,700.00. -
Sale!
18k white and rose Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $4,050.00.$2,700.00Current price is: $2,700.00. -
Sale!
18k white and yellow Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $4,050.00.$2,700.00Current price is: $2,700.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount, holds a 6.5mm center, ring size 6
Original price was: $4,080.00.$2,720.00Current price is: $2,720.00. -
Sale!
18k rose gold Elite Color Couture Collection diamond engagement ring semi-mount, holds a 6.5mm center, ring size 6
Original price was: $4,080.00.$2,720.00Current price is: $2,720.00. -
Sale!
18k yellow gold Elite Color Couture Collection diamond engagement ring semi-mount, holds a 6.5mm center, ring size 6
Original price was: $4,080.00.$2,720.00Current price is: $2,720.00. -
Sale!
14k Color Couture Collection natural diamond halo engagement ring semi-mount, ring size 6
Original price was: $4,095.00.$2,730.00Current price is: $2,730.00. -
Sale!
14k Color Couture Collection cushion cut diamond engagement ring semi-mount, ring size 6
Original price was: $4,020.00.$2,747.00Current price is: $2,747.00. -
Sale!
14k Color Couture Collection cushion cut diamond engagement ring semi-mount, ring size 6
Original price was: $4,020.00.$2,747.00Current price is: $2,747.00. -
Sale!
14k Color Couture Collection cushion cut diamond engagement ring semi-mount, ring size 6
Original price was: $4,020.00.$2,747.00Current price is: $2,747.00. -
Sale!
14k Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $4,110.00.$2,808.50Current price is: $2,808.50. -
Sale!
14k white and rose gold Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $4,110.00.$2,808.50Current price is: $2,808.50. -
Sale!
14k white and yellow gold Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $4,110.00.$2,808.50Current price is: $2,808.50. -
Sale!
*14k Color Couture Collection diamond engagement ring semi-mount, holds 6.5mm round center stone, ring size 6
Original price was: $4,110.00.$2,808.50Current price is: $2,808.50. -
Sale!
*14k Color Couture Collection 5.5mm princess cut diamond engagement ring semi-mount, ring size 6
Original price was: $4,170.00.$2,849.50Current price is: $2,849.50. -
Sale!
14k Color Couture Collection diamond halo engagement ring, holds a 6.5mm center stone, ring size 6
Original price was: $4,230.00.$2,890.50Current price is: $2,890.50. -
Sale!
14k Color Couture Collection 8x6mm emerald cut engagement ring semi-mount with natural diamond halo, ring size 6
Original price was: $4,245.00.$2,900.75Current price is: $2,900.75. -
Sale!
14k white and rose gold Color Couture Collection 8x6mm emerald cut engagement ring semi-mount with natural diamond halo, ring size 6
Original price was: $4,245.00.$2,900.75Current price is: $2,900.75. -
Sale!
14k white and yellow gold Color Couture Collection 8x6mm emerald cut engagement ring semi-mount with natural diamond halo, ring size 6
Original price was: $4,245.00.$2,900.75Current price is: $2,900.75. -
Sale!
18k white and yellow gold Elite Color Couture Collection diamond engagement ring semi-mount with diamond halo and milgrain beading, ring size 6
Original price was: $4,440.00.$2,960.00Current price is: $2,960.00. -
Sale!
18k Elite Color Couture Collection diamond engagement ring semi-mount with diamond halo and milgrain beading, ring size 6
Original price was: $4,545.00.$3,030.00Current price is: $3,030.00. -
Sale!
*18k Elite Color Couture Collection cathedral style engagement ring semi-mount, ring size 6
Original price was: $4,680.00.$3,120.00Current price is: $3,120.00. -
Sale!
14k white and rose gold Color Couture Collection 3-stone engagement ring semi-mount, holds a 6.5mm round center, ring size 6
Original price was: $4,725.00.$3,150.00Current price is: $3,150.00. -
Sale!
14k white and yellow gold Color Couture Collection 3-stone engagement ring semi-mount, holds a 6.5mm round center, ring size 6
Original price was: $4,725.00.$3,150.00Current price is: $3,150.00. -
Sale!
14k Color Couture Collection 3-stone engagement ring semi-mount, holds a 6.5mm round center, ring size 6
Original price was: $4,725.00.$3,150.00Current price is: $3,150.00. -
Sale!
18k Elite Color Couture Collection Chatham 5.5mm princess cut engagement ring semi-mount with diamond halo, ring size 6
Original price was: $5,034.00.$3,356.00Current price is: $3,356.00. -
Sale!
18k Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $5,190.00.$3,460.00Current price is: $3,460.00. -
Sale!
18k white and rose gold Elite Color Couture Collection natural diamond engagement ring semi-mount, ring size 6
Original price was: $5,190.00.$3,460.00Current price is: $3,460.00.
Custom Jewelry Services
One-of-a-kind and customizable jewelry pieces
Custom Jewelry Design
One-of-a-kind custom jewelry from scratch.
Jewelry Gallery
Thousands of customizable jewelry pieces.
Finished Jewelry
Finished Jewelry Collections
Loose Stones
Natural and lab-grown diamonds and gemstones
Colored and colorless diamonds carefully grown.
Premium Chatham-created colored gemstones.
We source natural diamonds and gemstones.
Our Work In Madagascar
Changing lives for children and their families
We get our hands dirty!
In 2014 Michelle went to Madagascar to learn about the geology and mineralogy of the country. She was excited to visit some of the mining localities she learned about in her studies to be a Graduate Gemologist. However, it wasn't the sparkly colorful gems that caught her eye. Rather, it was the children...the little gems of Madagascar. Michelle founded www.GemsOfMadagascar.org in 2015. She visits Madagascar for about two months each year doing humanitarian projects, including clean water, sanitation, education and hygiene.
What We Do |
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| Visit GemsOfMadagascar.org for more details. | ||||