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Post by greig on Apr 26, 2017 13:44:41 GMT -5
Rockhounding last weekend in Eastern Ontario and found a cavity with tremolite. I am not sure what to do with it yet, but I collected some nice clusters. Here is one of the clusters (about 10" wide) containing clear and green tremolite in calcite:
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Post by 150FromFundy on Apr 26, 2017 18:08:25 GMT -5
Where is eastern Ontario? I have found Tremolite around Bancroft, but not quite that nice.
Darryl.
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spiritstone
Cave Dweller 
Member since August 2014
Posts: 2,061 
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Post by spiritstone on Apr 26, 2017 18:18:38 GMT -5
Any of it gem grade material? A little info on it.
Small colorless and transparent tremolite crystals are very rare, and cut gems are true collector items. The largest of these is in the 5-10 carat range. Larger crystals exist but are usually badly fractured. Hexagonite is known in facetable material only from New York and these pieces yield gems to only about carat. Chrome tremolite is also very rare and cut gems are tiny. Catseye hexagonites have also been cut. Private Collection: 1.21 (medium purple, New York). National Museums of Canada (Ottawa, Ontario): 1.39 (deep purple, New York); 4.55 (dark blue catseye, Ontario); 12.55 (dark brown catseye, Ontario).
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micellular
has rocks in the head
Rock fever is curable with more rocks.
Member since September 2015
Posts: 640
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Post by micellular on Apr 26, 2017 18:27:37 GMT -5
I have a teeny piece of facet grade chrome tremolite less than half the size of my pinky fingernail. It's this color and transparency:  |
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georgeb138
having dreams about rocks
Member since April 2017
Posts: 68
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Post by georgeb138 on Apr 26, 2017 19:30:59 GMT -5
Wish I could find stuff like this! Sadly, I love in Florida.
Not bad for fossils here, but terrible for good mineral specimens.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,723
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Post by Fossilman on Apr 27, 2017 9:00:09 GMT -5
Now that material is crazy cool!!!!
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Post by greig on Apr 27, 2017 9:03:04 GMT -5
Where is eastern Ontario? I have found Tremolite around Bancroft, but not quite that nice. Darryl. Close to Bancroft: Tory Hill. There is lots remaining in this exposure. It was not my spot (I was shown it by another fellow), so it would be poor form to give the exact location. |
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Post by greig on Apr 27, 2017 9:23:15 GMT -5
Any of it gem grade material? A little info on it. Small colorless and transparent tremolite crystals are very rare, and cut gems are true collector items. The largest of these is in the 5-10 carat range. Larger crystals exist but are usually badly fractured. Hexagonite is known in facetable material only from New York and these pieces yield gems to only about carat. Chrome tremolite is also very rare and cut gems are tiny. Catseye hexagonites have also been cut. Private Collection: 1.21 (medium purple, New York). National Museums of Canada (Ottawa, Ontario): 1.39 (deep purple, New York); 4.55 (dark blue catseye, Ontario); 12.55 (dark brown catseye, Ontario).
Some of the larger clear crystals look to be fractured or have inclusions. However, I suspect some of the larger golfball sized pieces that are brown or grey might be ok to cab, but it is not my expertise. I understand that Ontario tremolite and actinolite when cut are called catseye. Sounds interesting and I should look into it more. I have a few more rocks to etch in acid and hopefully some nice crystals will be exposed. There are small loose crystals throughout the calcite too.
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Post by 1dave on May 7, 2017 11:10:10 GMT -5
I have found tremolite from the test drill holes at Desert Mound west of Cedar City Utah.  |
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Post by fantastic5 on May 7, 2017 14:04:24 GMT -5
Really cool cabinet specimen! Not everything has to be tumbled, cabbed or faceted. I am a big fan of natural beauties! Please post more pictures once you've completed the acid etching.
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