Stilbite vs Rutile
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Stilbite
Stilbite is a group of hydrated calcium and sodium aluminosilicate minerals in the zeolite family. It commonly forms pale, glassy crystals arranged in sheaf-like, fan-shaped, or bow-tie aggregates, which makes it popular with mineral collectors. Stilbite occurs in cavities and veins of volcanic rocks, especially basalt, where it forms from mineral-rich fluids. The name comes from the Greek word me...
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Rutile
Rutile is a naturally occurring oxide mineral composed mainly of titanium dioxide (TiO2). Its tetragonal crystals are commonly reddish-brown or yellow-brown and have a very high refractive index, strong birefringence, and notable dispersion. Fine rutile needles in quartz and other gems can create chatoyancy or asterism when aligned, and rutilated quartz is a recognized collector and gem material....
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