Prehnite Cabochon Teardrop gemstonePrehnite Cabochon Teardrop gemstone Descriptions Prehnite was officially named in 1788 after a Dutch colonel named Hendrik von (or van) Prehn. Prehn a naturalist and mineral collector was given credit for discovering the stone in 1774, at the Cape of Good Hope in modern South Africa. This stone has been given a number of other names over the years, including adelite, chiltonite, chrysolite of sage, coupholite, Karoo stone, grape jade and more. This
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