Lab Grown Diamond
Lab-grown diamond jewellery from Riyanika , 18K solid gold, every centre stone GIA-certified. Lab-grown diamonds are chemically identical to mined diamonds at roughly 40–60% of the price.
18K 2ct Oval Shaped Lab Grown Diamond Solitaire Engagement Ring
18K 3ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 0.72ct Oval Shaped Lab Grown Diamond Solitaire Engagement Ring
18K 10.43ct Pear Shaped Lab Grown Diamond Toi et Moi Engagement Ring
18K 2ct Emerald Cut Lab Grown Diamond Solitaire Engagement Ring
18K 2ct Emerald Cut Lab Grown Diamond Bezel Solitaire Engagement Ring
18K 4ct Pear Shaped Lab Grown Diamond Toi et Moi Engagement Ring
18K 3.09ct Emerald Cut Lab Grown Diamond Side Stone Engagement Ring
18K 5.71ct Radiant Cut Lab Grown Diamond Solitaire Engagement Ring
18K 3.58ct Radiant Cut Lab Grown Diamond Side Stone Engagement Ring
18K 2.5ct Radiant Cut Lab Grown Diamond Solitaire Engagement Ring
18K 2.53ct Heart Shaped Lab Grown Diamond Halo Engagement Ring
18K 1ct Oval Shaped Lab Grown Diamond Bezel Engagement Ring
18K 2ct Oval Shaped Lab Grown Diamond Solitaire Engagement Ring
18K 2.42ct Oval Shaped Lab Grown Diamond Pave Engagement Ring
18K 2.57ct Oval Shaped Lab Grown Diamond Three Stone Engagement Ring
18K 2.5ct Emerald Cut Lab Grown Diamond Side Stone Engagement Ring
18K 2ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 1ct Cushion Cut Lab Grown Diamond Solitaire Engagement Ring
18K 2ct Asscher Cut Lab Grown Diamond Solitaire Engagement Ring
18K 1ct Asscher Cut Lab Grown Diamond Solitaire Engagement Ring
18K 2ct Radiant Cut Lab Grown Diamond Solitaire Engagement Ring
18K 1ct Radiant Cut Lab Grown Diamond Solitaire Engagement Ring
18K 1ct Oval Shaped Lab Grown Diamond Hidden Halo Solitaire Engagement Ring
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Lab-grown diamonds are real diamonds, grown in a lab instead of mined. Same carbon, same crystal structure, same brilliance. Every Riyanika piece is set in 18K solid gold with a GIA-certified centre stone.
What every Riyanika piece shares
18K solid gold (yellow, white or rose), hand-finished and hallmarked. GIA-certified diamonds with grading reports for every centre stone above 0.30 ct. Lifetime cleaning and prong-check service. 30-day returns on non-bespoke pieces.
Browse by category
Engagement rings, necklaces, earrings, bracelets, rings, tennis bracelets.
Browse by material
Lab-grown diamond jewellery, natural diamond jewellery, fancy coloured diamond jewellery.
What comes with every piece
GIA grading report for the centre stone where applicable, a formal appraisal for insurance on pieces over $1,000, 18K solid gold in yellow, white or rose (hallmarked), and our lifetime cleaning and prong-check service. Every order ships in a signature Riyanika box.
Bespoke
Not seeing the exact combination you want? Every Riyanika piece can be made bespoke at no extra cost on most designs. Start your design here and we will send a CAD render for your approval before any gold is cut.
Frequently Asked Questions
What is Riyanika's signature material?
18K solid gold set with GIA-certified natural or lab-grown diamonds. Every piece hallmarked. We do not sell plated, gold-filled, or vermeil jewellery at any price point.
Is every diamond certified?
Every centre diamond over 0.30 ct is GIA-certified. Smaller accent stones ship with a Riyanika quality certificate confirming the 4Cs and origin.
What's your returns policy?
30-day returns on all non-bespoke pieces. Bespoke and engraved pieces are final sale because they are made specifically for the buyer. First ring resize within 60 days is free.
Do you offer lifetime service?
Yes. Professional cleaning, prong checks and polishing are free for life at Riyanika on every piece we make.
Can I trade in or upgrade my piece later?
Yes. Our lifetime upgrade programme lets you trade in any Riyanika piece and put 100% of its purchase price toward a more expensive one.
Do I need insurance?
Above $1,000, yes. Standard home insurance usually does not fully cover jewellery. Every piece over $1,000 ships with a formal appraisal that your insurer will accept. Jewellers Mutual (US) and T H March (UK) are reliable options.