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Quartz is the second-most-abundant mineral in Earth's continental crust, after feldspar. Its...
Labradorite ((Ca, Na)(Al, Si)4O8), a feldspar mineral, is an intermediate to calcic...
It is a rare type of quartz, is called negative because of...
A crystal dendrite is a crystal that develops with a typical multi-branching...
Hematite crystals have an excellent grounding and balancing energy, as well as...
Rhodonite is a manganese inosilicate, (Mn, Fe, Mg, Ca)SiO3 and member of...
Rough Gem
The rubellite is a particularly beautiful gemstone from the colourful family of...
Rutile has among the highest refractive indices at visible wavelengths of any...