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Bristows or bristol diamonds - a type of crystal.
Bracteates - thin gold copies of coins or jewels, buried with the dead by the Greeks and antiquities.
Bristol Stone/Bristol Diamond
Old trade-term for colorless crystal quartz. Also a trade name for colored glass imitations, Bristol Glass or Bristows.
Bruting
A method of rough-diamond fashioning by rubbing one diamond against another.
Brighton diamond, Bristol diamond, Buxton diamond,
Cape May diamond, Cornish diamond, Herkimer diamond,
Dauphin diamond, German diamond, Hawaiian diamond, ...
aka Clear Quartz, Rock Crystal, Baffa Diamond, Bohemian Diamond, Brighton Diamond, Bristol Diamond, Buxton Diamond, Cornish Diamond, Dauphin Diamond, German Diamond, Horatio Diamond, Hot Springs Diamond, Mutzschen Diamond, Occidental Diamond, ...
Alaska diamond, Bristol diamond, Buxton diamond, Cornish diamond, etc. zircon altered by heat treatment simulates a diamond. All of these imitations are distinguishable by their degrees of hardness and brilliance and by their refractive indices.
 See also: Jewel, Crystal, Diamond, Stone, Rough
  
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