Doug Menadue :: Bespoke Gems - Precision Hand Faceted Gemstones Of The Highest Quality

Aquamarine

I am able to offer to the public one of the finest selections of beautiful aquamarines in Sydney.
The aquamarines shown here are just a very small selection of what I can offer you.
By appointment only.


Aquamarine

Aquamarine, Smith Bar, #191 - Doug Menadue :: Bespoke Gems
17.6 ct
$POA
Aquamarine, Antique Round, Mozambique, 9.73 Carats, 9.86 Carats, 13.15X13.15X10.69mm, 13.14X13.16X10.75mm, #1062, A wonderful matched pair of beautiful aquamarines cut in the classic Antique Round design. Doug Menadue :: Bespoke Gems :: WWW.BESPOKE-GEMS.COM - Finest Precision Custom Gemcutting Based In Sydney Australia
9.73ct, 9.86ct
$POA
#190312, Santa Maria Blue Aquamarine, Cushion, 20.35 Carats, 13.16X13.11X10.41mm - Doug Menadue :: Bespoke Gems - WWW.BESPOKE-GEMS.COM - Precision Gemcutting and Lapidary Services In Sydney Australia
20.35 ct
$POA
#190365, Deep Seafoam Blue Aquamarine, Diamond Cushion, 13.98 Carats, 13.16X13.11X10.41mm - Doug Menadue :: Bespoke Gems - WWW.BESPOKE-GEMS.COM - Precision Gemcutting and Lapidary Services In Sydney Australia
13.98 ct
$POA


Information For precious and semi precious gemstones

Stone : Aquamarine
Moh's Hardness : 7.5 - 8
Origin Locations : Minas Gerais, Brazil; Nigeria, Tanzania, Mozambique, Zambia, Namibia, Africa; Sir Lanka, Madagascar; USA; India; Burma; Afghanistan; Pakistan; O'Briens Creek, NQ, Harts Ranges, NT, Australia
Treatments : None, Heating
Clarity : Eye Clean to Included
Color : Various shades of blue to blue-green
Cleavage : Indistinct
Crystal System : Hexagonal prisms
Chemical Composition : Al2Be3(Si6O18) - Aluminum Beryllium Silicate
Refractive Index (RI) : 1.564 - 1.596
Density : 2.68 - 2.74
Birthstones : Aquamarine is the birthstone for March.
Aquamarine is the zodiac stone for Aquarius.
Aquamarine is the stone for the 19th anniversary.

Comments : Aquamarine has long been among the most popular gemstones that people have worn. It is one of the big names, along side emeralds, sapphires, rubies and diamonds. All throughout history it has been mentioned. The name "aquamarine" comes from the Latin meaning "water of the sea" and is so named because of its beautiful blue-green colour. Aquamarine occurs in light blue to dark blue and blue-green, with a very intense blue variety named "Santa Maria" after the mine with the same name in Ceara, Brazil.

Aquamarine is a member of the Beryl family, along side emeralds (green chrome/vanadium containing), morganite (pink), heliodor (golden yellow) and goshenite (colorless). The colouring agent in aquamarine is iron. Aquamarines are commonly subjected to various treatments, such as heating and neutron or gamma irradiation. This is done to improve the colour or remove the green from a stone. I think its a bit of a shame that the green is so often cooked from aquamarine to create a more bluer stone. It is this blue-green colour for which aquamarine has gained its name, and the blue-green colour is truly beautiful and clearly marks the gem as being an aquamarine.

Care must be taken with aquamarine as it can be brittle and sensitive to pressure, as well as being sensitive to high temperatures, so be careful when making jewelry as it can result in possible discoloration. Aquamarines are often cut in classic step (emerald) cuts or scissor cuts as these styles help enhance the stone's colour.

In the past decade, Pakistan has been producing alot of aquamarine, both as facet rough and magnificent specimens that are popular with mineral collectors. This material is often quite pale but very clear and free of inclusions. Some of the best and richest coloured aquamarine that I have personally seen has come from O'Briens Creek near Mt Surprise, North Queensland, Australia. This location is famous for topaz however there is some great aquamarine to be found there as well. A pic of a big aquamarine crystal from O'Briens Creek can be seen
here, and another here. The colour of these crystals is as beautiful as it comes.

Aquamarine can be found in quite large crystals. One of the largest aquamarine crystals on record was found in 1910 at Marambaya, Minas Gerais, Brazil. This monster weighed 110.5kg (243lbs) and was 48.5cm (18in) long and 42cm (15.5in) in diameter. It was gem quality and believed to have been be cut into many gemstones with a total combined weight of over 100,000 carats! Thats alot of aquamarine... imagine finding that aquamarine crystal... not something you'd find everyday.

 

 

 

 

 

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