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Cattelle Diamonds Glossary

Cattelle Diamonds Digest Page of 448 Cattelle Diamonds Glossary Text size:minusplusRestore normal size  Mail page Print this page
       
     
 
424
THE DIAMOND
 
 

 
 
GLOSSARY
Bahias.— Brazil diamonds from the Bahia district.
Bizel.— The upper portion, above the girdle, of a brilliant-cut
diamond. Blue ground.— Unoxidized rock of the diamond chimneys. Bort.— Diamonds fit for mechanical purposes only. Bruting.— Polishing diamonds by rubbing them together. Bubbles.— Small, hollow-appearing specks in the body of the stone. Bywaters.— Decidedly yellowish diamonds.
Capes.— Yellowish white diamonds.
Carat.— An unofficial weight used for weighing precious stones.
Carbon spots.— Opaque black spots in diamonds.
Cascalho.— Diamondiferous gravels, Brazil.
Chips.— Cleavage under three-fourths of a carat.
Clatersal.— Small diamond splints from which diamond powder is produced by crushing.
Clean.— Free from noticeable flaws.
Cleavage.— Diamond crystals which require cleaving, also pieces cleaved, and large fragments.
Clouds.— Flat, subtransparent blotches along the grain of the stone.
Close-goods.— Diamond crystals requiring no preparation for cut­ting.
Color-play.— Prismatic colors produced by dispersion.
Compound.— An enclosure at Kimberley in which the natives are held while they work in the De Beers Consolidated Mines.
Crystals.— White diamonds.
Culet.— Small flat facet at the bottom of a brilliant-cut diamond.
Diamond drills.— Cylindrical iron pipes having carbon or bort set
in the edge as teeth, for drilling. Dop.— Device for holding diamond during the process of cutting
and polishing.
Estrellada.— Decomposed stratified rock showing starry white points. A diamondiferous deposit of Brazil.
 
 

 
       
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