Certified Loose Diamonds 248.244.0600
My Account .:. Sitemap .:. Contact Us
ThisIsJewelry.com
Home Education Price Calculator Order Help Contact Us

Ask an Expert
Make a Special Request

Glossary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ALL

Baguette
A French word meaning “rod.” A style of “step cutting” for small, rectangularly or trapeze-shaped gemstones, principally diamonds.
Bezel
(a) That proportion of a brilliant-cut gemstone above the girdle; same as crown. (b) More specifically, the sloping surface between the girdle and the table. (c) Still more specifically, only a small part of that sloping surface just above the girdle; the so-called “setting edge.”
Bezel Facets
The eight large, four-sided facets on the crown of a round, brilliant-cut gem, the upper points of which join the table and the lower points, the girdle. Some diamond cutters further distinguish four of these as “quoin” or “top-corner” facets.
Black Diamond
When a diamond is dark gray, a very dark green or truly black, it is referred to in the trade as a “black diamond.” Such a stone may be opaque to nearly semitransparent.
Blemish
Any surface imperfection on a fashioned diamond; e.g., a nick, knot, scratch, abrasion, minor crack or cavity, or poor polish. Also, a natural or an extra facet, visible on or through the crown, usually is considered a blemish.
Blue Diamond
A diamond with a distinctly blue body color, even thought very light in tone, is a fancy diamond. Diamond that are blue in both daylight and incandescent light are rare, although fluorescence stones that show a blue color in daylight are comparatively common. A blue color may also be induced artificially.
Blueground
A miner’s nickname for “kimberlite,” the rock that contains diamonds in the South African pipe mines.
Break Facets or Girdle Facets
The 32 triangular facets that adjoin the girdle of a round brilliant-cut stone, 16 above and 16 below. Also called upper- and lower-girdle facets, upper- and lower-break facets, top- and bottom-half facets, skew facets or cross facets. Facets are sometimes placed directly on the girdle, in which case the stone is usually said to have a “faceted girdle,” to have a polished girdle or to be “girdle faceted.”


Home
| Education | Book of Diamond Knowledge | Glossary | Price Calculator | Select a Setting | Order | Help
How to Use Price Calculator | Frequently Asked Questions (FAQ) | Sitemap | Contact Us | Send To A Friend
Ask an Expert | Special Request | User Account | Create Account | Login to Account | Change Password | Links
Terms & Conditions | Privacy Terms & Conditions | Privacy Policy | Related Reference | More About Diamonds

All Content © 2002 - 9432 ThisIsJewelry.com, Inc.