Howlite vs Sinhalite
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Howlite
Howlite is a white to gray borate mineral, a calcium borosilicate hydroxide, first identified in 1868 in Nova Scotia and named for the Canadian geologist Henry How. It typically occurs as nodules marked by dark, spiderweb-like veins. Its relatively low hardness allows it to take dye easily, and it is frequently colored to imitate turquoise in jewelry, as well as carved into beads and decorative ob...
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Sinhalite
Sinhalite is a magnesium aluminum borate mineral with the chemical formula MgAlBO4. It was identified as a distinct mineral after specimens from Sri Lanka had been mistaken for peridot, and its name refers to the island's historical name, Sinhala. Transparent material can be cut as a gemstone and commonly appears in yellow, brownish-yellow, or greenish-brown colors. It is an uncommon mineral in bo...
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