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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.
Birthstone of March: the aquamarine - Royal Coster Diamonds

Birthstone of March: the aquamarine

Why an aquamarine?

Literally translated, aquamarine means “water of the sea” or “sea stone”. It may come as no surprise that people thought the gemstone was connected to the sea somehow. The stories from old times tell that aquamarines come from the treasure chests of mermaids. People thought they bring love and happiness and cure a sore throat, rhinitis and autoimmune diseases.

Aquamarine stands for

  • Comforting people who grief over the loss of their loved ones or objects.
  • Creating clarity in times of uncertainty.
  • Improving intelligence.
  • Creativity
  • Understanding of fears and phobias.
  • Strengthening the senses.
  • Healing of a sore throat, curing heart diseases, sleep- and thyroid problems.

Origin of the aquamarine

The name aquamarine comes from the Latin words “aqua” and “marina”. These two mean “water” and “sea”. According to the myth, seafarers wore the stones to protect them from the dangers of the seas. Because the color of aquamarine resembles the seas and oceans. As a gemstone from the treasury of the mermaids, people thought an aquamarine had a positive effect on their love life. It would bring happiness and harmony and should also do wonders for your marriage. But there is more. The gem has a positive effect on the heart, liver, and throat. It also has a positive effect on sleep because the stone has a soothing effect.

Aquamarine is the birthstone of March. But is also the gemstone of Gemini, Aquarius, Pisces, and Libra. Moreover, it is also the stone that belongs to the 19th marriage anniversary. Aquamarine is mainly found in Brazil, Madagascar, Pakistani and Zimbabwe.

Color of aquamarine

The aquamarine color suits everyone, regardless of their hair, eye, or skin color. The stone is a variety of beryl, just like the emerald. The color of aquamarine varies from blue-green to bright light blue.

Learn more about colored diamonds and stones

Do you want to learn everything about colored gems and colored diamonds? Book one of our diamond tours and see some of the worlds greatest (colored) diamonds. Explore many historical artifacts and much more!
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