green agate

Green Agate

Agate is a microcrystaline variety of silica, chiefly chalcedony, characterised by its fineness of grain and brightness of colour. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks. Although green agate does occur naturally the majority of material used in the jewellery trade is treated.

Stock Sizes: Available in cabochon and flat signet stones
Round: 2mm – 40mm
Oval: 4x3mm – 40x30mm
Marquise: 4x2mm – 22x8mm
Pear: 6x4mm – 25x15mm
Heart: 4mm – 8mm
Square: 6mm – 30mm
Octagon: 8x6mm – 14x12mm
Rectangle: 8x6mm – 18x13mm
Free form Cabochon and mixed slices/carvings are available

Chemical Formula: SiO2 silicon dioxide (Quartz variety)
Crystal Structure: Microcrystalline
Colour: All colours, multicoloured and banded
Hardness: 6.5-7 on Moh`s scale
Refractive Index: 1.530 – 1.540
Specific Gravity: 2.58–2.64
Cleavage: None

Treatments: Dying (Dying Chalcedony, Agate and Onyx first involves boiling the stone in a strong bicarbonate solution, then soaking the stone in a chemical solution.)

Care: Agate can be cleaned very easily using warm soapy water and a soft brush. Keeping in mind its hardness and durability, be sure to not use any other objects that are harder than agate for scrubbing or cleaning. Agate should avoid any prolonged exposure to extreme of heat as it may cause permanent damage to the gemstone.