ヒデナイト Hiddenite is a form of spodumene containing chromium, but is rare and for the most part known only to collectors. The green color varies from a yellowish to a bluish green and can even approach the beauty of an emerald green. Hiddenite was originally found only in Hiddenite, North Carolina (hence the name). More recently, there have been finds in Madagascar, Brazil and Afghanistan and the supply of this intriguing gem has improved.
Hiddenite is strongly pleochroic, meaning there is a color intensity variation when a crystal of it is viewed from different directions. The top and bottom of the crystal reveal the deepest colors and expert gem cutters take advantage of its effects. Due to hiddenite's cleavage, splintery fracture and strong pleochroism, it is considered a real gem cutter's challenge.
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