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discovered a way to improve the quality of turquoise in the 1980's
a man named Sterling
Russia and Brazil
Turquoise beads found in Iraq date back to 5000 BCE
The inner layer of the shell is composed of nacre (mother-of-pearl)
Prehnite 8x10-9x13mm Side Drilled Pebble - 15-16 Inch Nylon Jaw Pliers discovered a way to improvePrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.
