One of the amazing gemstone family known as “zircon”. Zircon has amazing colour varieties with it’s own unique characteristics. There is a zircons what i found from danu group minings
Color : Bi Colour ( Light Olive Green & Orangy-Yellow )
Shape : Alluvial broken Half Crystal
Clarity : Slightly Included
Treatment : Unheated
Height : 7.4 mm
Width : 6.8 mm
Depth : 6.3 mm
Weight : 3.50 Cts
Variety: Bi Colour Zircon
Species: Natural ZIRCON
Location : Rakwana, Sri Lanka 🇱🇰
Comment : quite rare color pattern of Zircon Gemstone family.
Color : Bi Colour ( Yellowish-green & Brown )
Shape : Tetragonal Crystal Formation
Clarity : Clean
Treatment : Unheated
Height : 7.3 mm
Width : 6.56 mm
Depth : 5.2 mm
Weight : 3.80 Cts
Variety: Bi Colour Zircon
Species: Natural ZIRCON
Location : Palmadulla, Sri Lanka 🇱🇰
Comment : Quite Rare Variety and also Visible cross mark of the tetragonal crystal structure
Zircon is nesosilicates group mineral. Its corresponding chemical formula is ZrSiO4. The name derives from the Persian zargun, meaning “gold-hued”. Zircon is a popular gemstone that has been used for nearly 2000 years.
The crystal structure of zircon is a tetragonal crystal system with 7.5 hardness according to the Mohs Hardness scale. Zircon is also very resistant to heat and corrosion and known as Insoluble gemstone.
This Uniaxial (+) mineral Specific gravity is 4.6–4.7. It’s heavy more than such as Sapphire, chrysoberyl, Garnet, spinel. Gem Businessmen use these physical properties to identify zircons from other gemstones.
Zircon has weak pleochroism and has colours such as Colorless, Very Strong Blue To Green-Blue, Yellow, Blue-Green, Yellowish Green, Yellow-Green, Brown, Orangy Yellow To Reddish Orange, Dark Brownish Red, Sometimes Purple, Gray To Bluish Gray, Brownish Gray. Colourless specimens that show gem quality are a popular substitute for diamond and are also known as “Matara diamond” ( Matara diyamanthi ).
Some quality Type brown zircons can be transformed into colourless and blue zircons by heating to 800 to 1000 °C. also, Also, the selected magenta colours can be yellowed by zircon heat treatment, which in some cases can be as high in colour as a yellow sapphire
Zircon has been classified into three types called high zircon, intermediate zircon ( medium zircon ), and low zircon.
There are Some using names for Zircon such as Hyacinth or jacinth: yellow-red, orange, red-brown to brown, Jargoon or jargon: light yellow to colourless stones, Beccarite: green zircon, Melichrysos: straw yellow, Starlite: blue heat treated zircon, Sparklite: colourless zircon.
Zircon is found in Madagascar, Sri Lanka, Tanzania, Cambodia, Australia, Burma, Afghanistan, Canada, USA, Thailand, Russia, Mozambique, Norway, Algeria, Angola, Australia, Armenia, Argentina, Austria, Vietnam, South Korea, South Africa, Saudi Arabia, Rwanda, Portugal, Peru, Oman, Pakistan, Nigeria, Nepal, Netherland, New Zealand, Namibia, Morocco, Mexico, Malaysia, Japan, Iraq, Irland, Indonesia, Hungary, Guyana, Greece, Germany, Finland, Denmark, Colombia, China.
Some Zircon also can be seen some colour shift under fluorescent and incandescent light. But it is not a strong colour change like colour changing alexandrite and colour changing garnet.
Zircon is the birthstone of December. It is also known as the stone of wisdom, honour, and wealth in relation to the month of December. The December birthstone is especially associated with blue zircon among other zircon colours.
