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Flourite with Pyrite

FLUORITE: 'fluorite with pyrite from one of Cornwall's most well-known lead mines. The fluorite forms lustrous bright yellow transparent to translucent cubic crystals to on edge. The fluorite displays an intense purple fluorescent under UV light.


Wulfenite with cerussite coating, cm, reportedly from Tuokexun, Xinjiang Uygur, China. Well-Arranged Molecules specimen and photo.

Geology Rocks [!]  Full disclosure: I am NOT the author of the great caption above. It's from a previous pinner.

Poster of rock & minerals, showing classification. I NEED this for my room. That way I can dream about earths materials in my sleep. - blast of color which makes it easy to fall in love with rocks!

"GeoPicture of the week: Tree fossil with opal growth rings -- This is an very rare sample: opal can be fairly common in petrified wood, but this is a fire opal, which makes it so much more valuable. …So how did this magnificent opalized tree came to be? Initially, water filled the cracks and empty spaces of the source fossil, and the silica content in the water hardened and turned into opal or chalcedony."

sun-hawk submitted: Amazing Rare Opalized Wood Boulder Opal with Bright Emerald Green and Blue Growth Rings.

Vivianite from Tomokoni adit, near Canutillos, Colavi, Potosi, Bolivia ❦ CHRYSTALS ❦ semi precious stones ❦

Vivianite from Tomokoni adit, near Canutillos, Colavi, Potosi, Bolivia ❦ CRYSTALS ❦ semi precious stones ❦