|Dimensions (mm)||60 x 27 x 16mm|
|Weight (carats)||112 carats|
MT SHASTA OPAL ROUGH
This is a specimen of rough mined at the base of Mt Shasta in California USA.It is formed of silica but lacks the fire of opal.Some parts are transparent with a green hue.
Weight 111.70 cts app
Size 60 x 27 x 16 mm app
About 593,000 years ago andesitic lavas erupted in what is now Mount Shasta's western flank near McBride Spring. Over time an ancestral Mount Shasta stratovolcano was built to large but unknown height; sometime between 300,000 to 360,000 years ago the entire north side of the volcano collapsed, creating an enormous landslide or debris avalanche,
The next cone to form is exposed south of Mount Shasta's current summit and is called Misery Hill. It was formed 15,000 to 20,000 years ago from pyroxene andesite flows and has since been intruded by a hornblende dacite dome.
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 10:08pm PST|
|Ends||18th Jan 2017 10:05pm PST|
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