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Find Your Ring Size

Royal Coster
Diamonds Size
MM / INCH (Circumference)
48 / 1.89 48 4½ I½ 8
49 / 1.93 49 4¾ J¾ 9
50 / 1.97 50 5½ K 10
51 / 2.01 51 5¾ L 11
52 / 2.05 52 6 L½ 12
53 / 2.09 53 6¼ M½ 13
54 / 2.13 54 6¾ N½ 14
55 / 2.17 55 7¼ O 15
56 / 2.20 56 7½ P 16
57 / 2.24 57 8 P½ 17
58 / 2.28 58 8¼ Q½ 18
59 / 2.31 59 8¾ R 19
60 / 2.36 60 9 S 20

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574 Results

Rainbow Spectrum Earrings

Royal Coster Diamonds

€ 2,500

Unit price
per 

Ronde de Monte-Carlo Classique Automatic 39mm

Ateliers deMonaco

€ 24,000

Unit price
per 

Ronde de Monte-Carlo Classique Automatic 39mm

Ateliers deMonaco

€ 24,000

Unit price
per 

Sapphire Diamond Necklace 1.40 Carat Round Cut 18K White Gold

Royal Coster Diamonds

€ 1,550

Unit price
per 

Sapphire Diamond Necklace 2.07 Carat Pear Cut with Marquise 18K White Gold

Royal Coster Diamonds

€ 3,350

Unit price
per 

Sea-Dweller Deepsea 116660 'James Cameron'

Rolex

€ 12,500

Unit price
per 

Signature C Embellished Earrings

Royal Coster Diamonds

from € 14,550

Unit price
per 

Signature C Embellished Ring

Royal Coster Diamonds

from € 8,950

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per 

Signature C Embellished Ring

Royal Coster Diamonds

from € 8,950

Unit price
per 

Signature C Solitaire Earrings

Royal Coster Diamonds

from € 2,750

Unit price
per 

Signature C Solitaire Earrings

Royal Coster Diamonds

from € 3,350

Unit price
per 

Signature C Solitaire Earrings

Royal Coster Diamonds

from € 3,350

Unit price
per 

Signature C Solitaire Earrings

Royal Coster Diamonds

from € 2,750

Unit price
per 

Signature C Solitaire Necklace

Royal Coster Diamonds

from € 2,250

Unit price
per 

Signature C Solitaire Ring

Royal Coster Diamonds

from € 2,250

Unit price
per 

Solitaire 0.25 Carat Brilliant Cut Diamond 18K Gold Ring

Royal Coster Diamonds

€ 0

Unit price
per 

Find your Signature ring

The Signature rings collection brings together the best rings from all of our signature collections. Whether it’s the bright colors of the Rainbow collection, the stylish Nikkie collection, the famous Royal 201 Signature C collection, the timeless Coster Classic collection, or the romantic rings from our Engagement and Wedding collection, every ring is chosen for its stunning look and fine quality.

This special collection is the very best we have. It includes many different designs, all made with the finest care and luxury in mind. Skilled craftsmen make each ring by hand, picking diamonds that shine and sparkle brightly. These signature rings show the top quality that we offer more than 180 years.

The Signature rings collection is perfect for someone who wants a ring that stands out. With everything from rings with many colors to simple and elegant designs, this collection lets you find the perfect ring that fits your own style and tells your personal story.

Get your dream ring

Whether you’ve set your eyes on an a wedding ring or a rainbow ring, we have what you’re looking for. We have many different ring settings. We can make one exactly how you want it and with the kind of diamonds you want. Contact us to find your dream rings.