Nata Heng Schluessel, GG logo Roland Schluessel, FGA

Aquamarines

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Aquamarine crystals are found jointly with other pegmatite minerals: Tourmaline, Kunzite, Quartz, Amazonite and other Beryls. Large boulders of massive Amazonite often contain gemmy Aquamarine crystals.

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We supply exquisite Aquamarines from the most World’s most renowned sources, mainly from Brazil and East-Africa. We specialize in classic cuts and sizes ranging from 1 carat to 15 carats.

We will not mislead our customers with obsolete trade names like “Santa-Maria”. The Brazilian mine Santa-Maria is exhausted since over 50 years and no stones from that legendary source are on the market since decades any more.

Our color grading for Aquamarines is very severe since we consider the color hue, the color tone and the color saturation. If you appreciate the purest “sky blue”, please contact us.

WHAT IS A GEM AQUAMARINE?

MINERAL SPECIES:

Beryl.

13APPEARANCE:

Best color = Light blue. Mainly found in nature as greenish blue to blue-green crystals.
The darker the color tone, the better is the quality. But no grey or greenish hue should spoil the pastel blue color.
Dichroism = Weak to moderate.
Transparency = Transparent.
Brilliancy = High.
Clarity = With the exception of Cat’s-Eye Aquamarine, gem-quality stones are expected to be “eye-clean”.
Phenomena = Cat’-eye (semitransparent; lower part unpolished).

PHYSICAL PROPERTIES:

Hardness = 7 ½ to 8.
Toughness = Good.
Cleavage = Poorly developed and not seen in gemstones.
Refractive Index = 1.577 – 1.583 (+/- 0.017)
Specific Gravity = 2.72 (+ 0.18, - 0.05)

CLEANING METHODS:

Ultrasonic and Steamer = Usually safe, unless stone contains feathers or liquid inclusions.
Warm soapy water = Safe.

STABILITY:

Reaction to heat = Generally not heat sensitive unless the stone contains liquid inclusions.

12MAJOR SOURCES:

Brazil, Mozambique, Nigeria, Zambia, Madagascar, Pakistan.

ENHANCEMENTS:

It is a common practice to heat most Aquamarines.

IMITATIONS:

Irradiated light blue Topaz, synthetic Spinel and glass.

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