Beautiful stone! Great large size- prefect for a pendant- thanks!
|Dimensions (mm)||25 x 18 x 5mm|
|Weight (carats)||not provided|
This is a natural untreated jasper mined in volcanic areas of indonesia-The stone takes a terrific polish with great colours.
Weight 16.90 cts app
Size 25 x 18 x 5 mm app
Jasper is an opaque rock of virtually any color stemming from the mineral content of the original sediments or ash. Patterns arise during the consolidation process forming flow and depositional patterns in the original silica rich sediment or volcanic ash. Hydro-thermal action is generally thought to be required in the formation of jasper.
Picture jaspers exhibit combinations of patterns (such as banding from flow or depositional patterns (from water or wind), dendritic or color variations) resulting in what appear to be scenes or images, on a cut section. Diffusion from a center produces a distinctive orbicular appearance, i.e., Leopard Skin Jasper, or linear banding from a fracture as seen in Leisegang Jasper. Healed, fragmented rock produces brecciated (broken)
The Gemstone Sheriff program allows our members to request an audit on any auction, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.
|Starts||25th Feb 2011 10:21pm PST|
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