Réf : BK661
Polished Howlite - Zimbabwe - polished stones 2.9 cm / 25g / BK661
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HOWLITE belongs to the borate group. It contains calcium, boron and silicon. It is a hydrated calcium borate silicate. Its chemical formula is Ca 2 B 5 SiO 9 (OH) 5 .
Howlite has a density of 2.6 (1 for water) and a hardness of 3.5/10 on the Mohs scale (10 for diamond). The line on porcelain is white.
Its nodular shape gives it a similarity to turquoise, especially when dyed. The natural color of Howlite is white.
The name Howlite comes from the name of its discoverer, the chemist H. How.
Unique piece - Contractual photos
Origin: Tumbled stones from Zimbabwe
Dimensions: 2.9 x 2.3 x 2 cm
Weight: 25 g
