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Lifetime free cleaning and polishing.

Free resizing service.

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Why not explore our new Luna Collection?

Find Your Ring Size

Royal Coster
Diamonds Size
Internal Diameter / Circumference (mm)​
14,01
14,33
14,65
14,97
15,21
15,61
15,92
16,24
16,56
16,88
17,20
17,52
17,83
18,15
18,47
18,79
19,11

How To Measure

The Hands-on Method​ Measure an Existing Ring
  • 1. Grab a tape measure, length of string or strip of paper.
  • 2. 2. Wrap one of these objects around your finger. Mark the place where the two end of the measuring object come together.
  • 3. When using string or paper grab a ruler. Lay it on a flat surface and measure to where the marked point is.
  • 4. Use the chart presented above to acquire the correct ring size.
rainbow collection, sparkling colours, jewelry

Sparkling colours for everyone

Rainbow Collection

All the colours of the rainbow form the fundament of our unique Rainbow Collection. The combination of sparkling sapphires and diamonds in our Rainbow Collection create a playful whole of colour and light for you to shine in any way you want to.

rainbow jewelry, colored diamond ring, bracelet, necklace
Rainbow Double Pave Earrings 18K Rose Gold - Royal Coster Diamonds

Rainbow Double Pave Earrings 18K Rose Gold

€2.900,00
Unit price
per 
Rainbow Double Pave Ring 18K Rose Gold - Royal Coster Diamonds

Rainbow Double Pave Ring 18K Rose Gold

€3.200,00
Unit price
per 

Rainbow Small Eternity Pendant 18K Rose Gold

€2.120,00
Unit price
per 
Rainbow Twist Pave Ring 18K Rose Gold - Royal Coster Diamonds

Rainbow Twist Pave Ring 18K Rose Gold

€2.650,00
Unit price
per 
rainbow collection, rainbow jewelry, luxury jewelry
luxury jewelry, colored diamond necklace