Fancy Diamond Jewelry

Fancy coloured diamond jewellery from Riyanika. Yellow, pink, blue, champagne and green diamonds, both lab-grown and natural, set in 18K solid gold. The rarest visual category of diamond.

235 products
18K
Natural

18K 4ct Emerald Cut Natural Diamond Solitaire Engagement Ring

4ct · Emerald · Solitaire
$522,510
18K
Natural

18K 2ct Emerald Cut Natural Diamond Solitaire Engagement Ring

2ct · Emerald · Solitaire
$186,723
18K
Natural

18K 2.3ct Emerald Cut Natural Diamond Halo Engagement Ring

2.3ct · Emerald · Halo
$189,469
18K
Natural

18K 2.5ct Emerald Cut Natural Diamond Solitaire Engagement Ring

2.5ct · Emerald · Halo
$117,291
18K
Natural

18K 2.32ct Round Cut Natural Diamond Side Stone Engagement Ring

2.32ct · Round · Side Stone
$200,060
18K
Natural

18K 4ct Cushion Cut Natural Diamond Solitaire Engagement Ring

4ct · Cushion · Solitaire
$478,575
18K
Natural

18K 3ct Oval Shaped Natural Diamond Solitaire Engagement Ring

3ct · Oval · Halo
$262,824
18K
Natural

18K 2.5ct Oval Shaped Natural Diamond Solitaire Engagement Ring

2.5ct · Oval · Solitaire
$267,532
18K
Natural

18K 3ct Heart Shaped Natural Diamond Solitaire Engagement Ring

3ct · Heart · Solitaire
$337,357
18K
Natural

18K 1.69ct Cushion Cut Natural Diamond Solitaire Engagement Ring

1.69ct · Cushion · Halo
$97,285
18K
Natural

18K 1.69ct Radiant Cut Natural Diamond Hidden Halo Engagement Ring

1.69ct · Radiant · Halo
$97,285
18K
Natural

18K 1.25ct Oval Shaped Natural Diamond Halo Engagement Ring

1.25ct · Oval · Halo
$58,449
18K
Natural

18K 1.5ct Pear Shaped Natural Diamond Solitaire Engagement Ring

1.5ct · Pear · Solitaire
$94,931
18K
Natural

18K 1.57ct Emerald Cut Natural Diamond Solitaire Engagement Ring

1.57ct · Emerald · Solitaire
$99,246
18K
Natural

18K 1.56ct Oval Shaped Natural Diamond Solitaire Engagement Ring

1.56ct · Oval · Solitaire
$98,854
18K
Natural

18K 2.44ct Cushion Cut Natural Diamond Three Stone Engagement Ring

2.44ct · Cushion · Three Stone
$192,215
18K
Natural

18K 2.5ct Oval Shaped Natural Diamond Solitaire Engagement Ring

2.5ct · Oval · Bezel
$282,438
18K
Natural

18K 3.94ct Oval Shaped Natural Diamond Halo Engagement Ring

3.94ct · Oval · Halo
$203,983
18K
Natural

18K 2.01ct Round Cut Natural Diamond Halo Engagement Ring

2.01ct · Round · Halo
$70,610
18K
Natural

18K 1ct Oval Shaped Natural Diamond Solitaire Engagement Ring

1ct · Oval · Bezel
$58,842
18K
Natural

18K 1.36ct Oval Shaped Natural Diamond Halo Engagement Ring

1.36ct · Oval · Halo
$63,549
18K
Natural

18K 1.45ct Oval Shaped Natural Diamond Halo Engagement Ring

1.45ct · Oval · Halo
$62,764
18K
Natural

18K 1.6ct Radiant Cut Natural Diamond Solitaire Engagement Ring

1.6ct · Radiant · Solitaire
$108,268
18K
Natural

18K 1.74ct Asscher Cut Natural Diamond Solitaire Engagement Ring

1.74ct · Asscher · Pave
$98,069

Showing 96 of 235

Fancy coloured diamonds carry a different kind of presence. The colour is the point, not the sparkle. Lab-grown fancies give you the same saturation at a fraction of the natural price; natural fancies carry investment-grade rarity.

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.