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When the mineral is exposed to radioactive gamma rays
The beautiful blue hues of this stone are caused by the substitution of copper for calcium
The banding in this piece is out of this world
Topaz from this area can be found alongside some other very interesting minerals known as fluorite
Fibrous Malachite - D.R. Congo When the mineral is exposedHere is an excellent example of fibrous malachite. Looking at the photos, you can see multiple different textures and lots of dimension to this specimen. There is a vein of the host matrix that was not removed during its preparation giving it a little extra character! Malachite is such a fun mineral to collect. Specimens can come in a wide range of green hues and crystal structures. Malachite with this interesting, fibrous texture, is a must have in
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