These natural Greyish White Howlites originate from United States and their total weight is about 5 carats. The measurements are 10.13mm x 8.08mm x 3.71mm (length x width x depth).These gemstones are calibrated to fit 10 X 8 mm jewelry settings. The shape/cut-style of these Howlites is Oval Cabochon. These 5.24ctw Howlite gems are available to order and can be shipped anywhere in the world. Gemstone Certification can also be provided as an optional service.
By chemical composition, howlite is a calcium borosilicate hydroxide. It was first discovered at Tick Canyon in southern California in 1868. It was named after Henry How (1828-1879), a Canadian mineralogist who first described it.
Howlite is typically white or grayish white with fine grey or black or brown veins, often in a web-like pattern. It is opaque with a sub-vitreous luster sometimes described as porcelaneous. It is usually found in borax deposits in the desert clays of California.
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