Fluorite : CaF2, Dolomite : CaMg(CO3)2, Quartz : SiO2

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Copyright © Brian Kosnar - Mineral Classics
minID: QAA-8FV

Fluorite : CaF2, Dolomite : CaMg(CO3)2, Quartz : SiO2

Copyright © Brian Kosnar - Mineral Classics  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 10.8 cm x 9.7 cm x 6.1 cm

10.8 x 9.7 x 6.1 cm

Here is a beautiful fluorite specimen from the Shangbao Mine. The large composite group of gemmy fluorite is predominantly octahedral in habit, but does show defined cubic faces. The color is a soft green hue, but slight purple highlights can be seen here and there. The largest individual crystal in the group measures 7.5 cm, which is quite large for the locality. If you look closely, you can see small white "spots" just below the surface of the fluorite. With a bit of backlighting and a loupe in hand, you can see that these "spots" are actually tiny single "floater" rhombs of beautiful white dolomite suspended inside the fluorite. A few of the crystals show a golden-brown hue, which is most likely the result of oxidation. This is one of the very few pieces of this material that I've seen from Shangbao. The matrix is a plate of massive white quartz, but you can see there are several well-formed, sharp, lustrous crystals of quartz on the lower edge of the piece for a really nice accent.

This photo has been shown 16 times
Photo added:21st Feb 2020
Dimensions:1800x1800px (3.24 megapixels)
Date/Time of Photo:22nd Nov 2019 20:07:02
Camera:CANON EOS 5D Mark II
Software:Adobe Photoshop CS6 (Windows)
Exposure time:1/6s
Focal Length:75mm
ISO speed:100

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