Tag Archives: mineral specimen

Madagascar: A Gemologist’s Journey (Sahatany Valley Pegmatite Field Part II)

My previous post I covered the first half of our day in the Sahatany Valley. I ended at the Estatoby dig where our group split up. I chose to continue on up the mountain. We begin the long hike up … Continue reading

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Amethyst With Calcite Specimen

This is one of my favorite amethyst specimens. This valuable piece features an interesting array of calcite crystals atop a bed of amethyst crystals. Calcite is very low on the hardness scale, 3, and has poor toughness, so it makes … Continue reading

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