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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (27): Howlite Howlite Clear All
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ID: 3224341 pcs
9.63ct Howlite
16.86 x 12.86 x 5.18mm
USD 24.07
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ID: 3224381 pcs
10.05ct Howlite
18.25 x 13.33 x 5.08mm
USD 25.12
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ID: 3209602 pcs
12.74ctw Howlite
14.19 x 10.45 x 4.87mm
USD 31.85
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ID: 4229876 pcs
91.64ctw Howlite
12.58mm
USD 73.31
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ID: 4229822 pcs
46.04ctw Howlite
14.47mm
USD 36.83
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ID: 2735471 pcs
8.56ct Howlite
16.22 x 12.44 x 4.89mm
USD 21.40
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Howlite
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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Size and Weight

Gems are always measured in Millimeter (mm)

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length x width x depth,
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Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

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