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Chemical Formula		Ca₂B₅SiO₉(OH)₅
Composition		Basic calcium silico-borate
Color		White, commonly marked with black or brown intersecting vine-like or skin-like veins
Streak		White
Hardness		3.5
Crystal System		Monoclinic
Crystal Forms and Aggregates		Occurs in giant masses and as fragments of them. Also occurs as large and small nodules resembling cauliflower heads. Large masses have the same texture as unglazed porcelain. Crystals, which are tabular, are barely noticeable with the naked eye. They are found in only one region in Nova Scotia, where the crystals occur on large nodules. Also occursscaly and earthy.
Transparency		Translucent in thin splinters; otherwise opaque
Specific Gravity		2.5 - 2.6
Luster		Dull, sometimes vitreous
Cleavage		None
Fracture		Conchoidal to even
Tenacity		Brittle
Other ID Marks		Sometimes fluorescent cream-yellow to white in shortwave ultraviolet light.
Complex Tests		Soluble in hydrochloric acid
In Group		Borates; Hydrous Borates
Striking Features		Mineral formations and localities
Environment		Borax evaporite deposits in dry lakes and in sedimentary clay.
Rock Type		Sedimentary
Popularity (1-4)		3
Prevalence (1-3)		2
Demand (1-3)		2