is a miner

Tourmaline spearing quartz

I fell in love with a similar piece at the Tucson mineral fair some years ago, though I sadly could not afford the price (in fact everything I really liked there was well beyond my modest means, I could easily have blown several million dollars over the month had I had it). As the water rich fluids in the granite pegmatite were cooling and precipitating their dissolved contents onto growing crystals, a lovely spear of bright blue tourmaline was enwrapped in a growing quartz crystal, testifying to the dance of energy and chemical affinity that affects the final form of all cooling magmas.

Loz

Image credit: Bijoux et mineraux

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Tanzanite with strong pleochroism changes color as it is turned