Norland, Ontario
Size: 3.0x0.9x0.7 cm
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Here's a rather long (just fits in the perky) singular gemmy tremolite prism showing very lustrous faces and green-blue colours. The top is not terminated but a plane of cleavage. A very nice sample!

Tremolite from the area is often dubbed "actinolite". Tremolite and actinolite are two very similar minerals that form a series with each other and essentially share the same chemical formula. Tremolite has a greater presence of magnesium over iron, whereas actinolite has a greater presence of iron over magnesium. Analyses have shown that actinolite is very rare and most specimens like this are tremolite.

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