|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
BLUE OREGON OPAL
This is a natural untreated parcel of opal with a blue tone from the oregon opal field that has been drilled.
Weight 15.65 cts app
Size 15 x 11 x 5 mm app
Mohs’ Hardness: 5.5 – 6.5
Density: 1.98 – 2.50
Composition: Hydrous silicon dioxide (SiO2· nH2O)
The opals are found in rhyolite geodes (thundereggs) in a perlite that has altered to a pastel colored clay. The geodes that contain gem-quality opal are only about 10% of the total geodes mined and only about 1% of the geodes contain gem-quality opal with play of color. The remaining geodes contain agate, quartz crystals, or common opal. The geodes vary greatly in size, from a few centimeters in diameter to over a meter.
Not happy to be honest, but it looks like the pictures so its not fair for me to give a bad review. It's covered in glue to make it shiny which I have to remove now. Pretty solid meh in my book. WIsh I hadn't spent so much money. Will be more cautious in54.95 CTS INDONESIAN WOOD FOSSIL STONE POLISHED [VS7042 ]
|Starts||16th Jan 2017 8:03pm PST|
|Ends||17th Jan 2017 8:00pm PST|
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