05 March

Aquamarine is the birthstone for March.

Aquamarine is the blue variety of Beryl.

Aquamarine gets its name from Latin “aqua marina” which means “sea water.” It references the similarity of the gemstone’s colour and clarity to that of the ocean.
Decorative jewellery and protective amulets using aquamarine have been found that date back as far as 500 B.C.

Aquamarine is well known for its distinctive blue-green colour. Shades range from deep teal to a pale, crystal blue. The depth of colour is actually influenced by the amount of iron found the each gem’s structure, and that is why the colour varies so much. The green variety of beryl, emerald, tends to be hazy and full of inclusions, while aquamarine is known to occur with excellent transparency and clarity.


Aquamarine ranges in colour from sea-foam green, to blue-green, to teal. The colour is graded on its hue, tone, and saturation – hue for whether it is a warm or cool shade, tone for how light or dark the colour is, and colour saturation for the quality of being dull or a vivid blue.


Aquamarine is mined in many countries across the world, including Brazil, Zambia, Nigeria, and Madagascar, as well as Pakistan and Mozambique.

Most of the world’s supply of quality aquamarine can be found in Brazil, but some of the finest quality aquamarines in the United States can be found in Colorado. In fact, the state recognized aquamarine as their official gemstone in 1971.


Many aquamarine gemstones are heat treated to bring their colour closer to a true, vibrant blue. This colour change is permanent, but it doesn’t harm or otherwise change the structure of the stone.


The largest aquamarine of gemstone quality ever mined was found in Marambaia, Minas Gerais, Brazil, in 1910. It weighed over 110 kg (240 lb), and its dimensions were 48.5 cm (19 in) long and 42 cm (17 in) in diameter.

Aquamarine is the traditional gift for a 19th wedding anniversary.

In Germany, thin aquamarine crystals were worn as eye glasses to correct short-sightedness.

Using a dichroscope, you can see aquamarine is near colourless and stronger blue in different crystal directions.

Aquamarine’s colour gets more intense as it gets larger. It is very difficult to find small sizes with saturated colour: most stones below a carat in size have a pale colour.


Aquamarine is said to protect sailors at sea, and many sailors have believed for generations that this stone has the power to bring them safely back home. Additionally, some people believe in the natural healing powers of crystals, and they use aquamarine to help alleviate symptoms of stress.

Buying tips

  1. Trust your colour preferences.
  2. If you prefer an aquamarine colour that has more green in it, you can buy a beautiful gem for less than you would pay for the same gem if it was a pure blue.
  3. Although aquamarine is the mineral beryl, like emerald, inclusions are much less accepted than they would be in emerald.
  4. As always, the better the colour, clarity and cut, the more expensive the gemstone.

Aquamarine is very durable and does not require any special care. Unless the jewel has an internal occlusion, it is safe to use in ultrasonic cleaners. At-home care requires only a soft brush and soapy water. Rinse and wipe.



  • Lot 123: AN AQUAMARINE, DIAMOND AND RUBY SET RING, with aquamarine of approx. 23ct, diamonds of approx. 0.30ct, rubies of approx. 0.35ct in total, mounted in 18ct yellow gold
  • Lot 148: AN AQUAMARINE AND DIAMOND CLUSTER RING, the rectangular aquamarine of approx. 1.30ct to an old cut diamond surround of approx. 0.95ct in total, mounted in white gold
  • Lot 153: AN AQUAMARINE AND DIAMOND NECKLACE, with floral centrepiece set with diamonds of approx. 0.95ct in total and one oval aquamarine pendant of approx 6.42ct, mounted in platinum.
  • Lot 192: AN AQUAMARINE AND DIAMOND PENDANT AND CHAIN, with one pear shape aquamarine of approx. 12.30ct, mounted in 18ct yellow and white gold.
  • Lot 315: AN AQUAMARINE AND DIAMOND THREE STONE RING, one step cut aquamarine of approx. 2.00ct, with two trilliant cut diamond sides of approx. 0.70ct in total, mounted in platinum.