Natural Diamond Necklaces

Natural diamond necklaces in 18K solid gold. Solitaire pendants, tennis necklaces, and station designs, each with earth-mined GIA-certified diamonds. The heirloom-quality necklace category.

241 products
18K
Natural

18K 1.29ct Marquise Shaped Natural Diamond Cluster Pendant Necklace

1.29ct · Marquise · Cluster
$36,873
18K
Natural

18K 1.15ct Emerald Cut Natural Diamond Necklace

1.15ct · Emerald
$73,746
18K
Natural

18K 0.98ct Marquise Shaped Natural Diamond Necklace

0.98ct · Marquise
$35,304
18K
Natural

18K 0.72ct Round Cut Natural Diamond Necklace

0.72ct · Round
$34,520
18K
Natural

18K 0.58ct Radiant Cut Natural Diamond Cluster Necklace

0.58ct · Cluster
$21,183
18K
18K
Natural

18K 0.11ct Round Cut Natural Diamond Solitaire Necklace

0.11ct · Solitaire
$18,045
18K
Natural

18K 0.6ct Marquise Shaped Natural Diamond Chain Necklace

0.6ct · Marquise
$32,166
18K
Natural

18K 1.65ct Round Cut Natural Diamond Lariat Necklace

1.65ct · Round
$42,365
18K
18K
Natural

18K 1ct Pear Shaped Natural Diamond Halo Pendant Necklace

1ct · Pear · Halo
$37,658
18K
18K
18K
Natural

18K 1ct Round Cut Natural Diamond Necklace

1ct · Round · Bezel
$28,244
18K
Natural

18K 2.62ct Round Cut Natural Diamond Lariat Necklace

2.62ct · Bezel
$50,603
18K
Natural

18K 1.33ct Round Cut Natural Diamond Necklace

1.33ct · Bezel
$39,227
18K
Natural

18K 0.75ct Round Cut Natural Diamond Chain Necklace

0.75ct · Bezel
$25,105
18K
Natural

18K 3ct Round Cut Natural Diamond Eternity Necklace

3ct · Eternity
$62,763
18K

Showing 168 of 241

A natural diamond necklace is the piece of jewellery most likely to be passed down. It sits close to the neck, it gets worn for the biggest moments, and it holds its value better than almost anything else you can put around your collarbone.

Solitaire pendants

The natural diamond pendant necklace is the most classic piece in the category. 1 ct is the most popular, 0.50 ct is the subtle everyday choice, and 2 ct starts to become an occasion piece.

Tennis necklaces

A natural diamond tennis necklace is the single most dramatic piece in our collection , 10 to 25 total carat weight of matched diamonds around the neck. It is the anniversary-milestone piece, the generational heirloom, the piece that becomes the centrepiece of a jewellery box.

Stations and layering

Station necklaces space a small number of natural diamonds along a fine chain for a more subtle effect. Layering chains work alongside a pendant and a watch for a modern, lived-in look.

Provenance

Every natural diamond on the collection is Kimberley Process certified and GIA-graded. The supply chain is auditable back to the mine. We include the certificate with every piece.

Bespoke

The necklace category is where bespoke requests most often come in. Customers want a specific centre stone in a specific pendant design. Start your bespoke natural diamond necklace.

Frequently Asked Questions

What size natural diamond pendant should I buy?

1 ct is our most popular size. Visible, elegant, not ostentatious. 0.50 ct is a good subtle everyday piece. 2 ct starts to become a statement piece. For a wedding gift, 1-1.5 ct is the sweet spot.

How much does a natural diamond tennis necklace cost?

Our natural diamond tennis necklaces start at around $15,000 for 10 tcw and rise to $80,000+ for 25 tcw. This is the highest-value category we sell. Typically milestone anniversary or 50th-birthday purchases.

Are natural diamond necklaces a good investment?

A GIA-certified natural diamond over 1 ct generally holds 40-60% of retail on the secondary market, better than most fine jewellery categories. Rare coloured diamonds have historically appreciated.

What chain length should I choose?

18 inches is the default. Sits just below the collarbone. 16 inches is choker-like. 20-22 inches drops lower and layers well with shorter chains.

How do I clean a natural diamond necklace?

Warm water, mild soap, soft toothbrush around the pendant and clasp. Bring it in annually for professional cleaning. Free for life on all Riyanika pieces.

Can I upgrade my natural diamond pendant 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.