Glossary
Table Size
Measure of the table width expressed as a percentage of the diameter. Table size is a proportion important to the balance between brilliance and dispersion.
Tapered Baguette Cut
Diamond cut or shaped into a triangle with one corner cut off, and rows or steps of elongated facets running parallel to the girdle on both the crown and the pavilion. It is a modified version of a standard baguette cut.
Tone
Degree or depth of colour in terms of lightness or darkness. The tone of a coloured diamond can range from very pale to very dark; it is the degree to which the colour of a diamond approaches white on the pale end, and black on the dark end.
Toughness
Measure of brittleness, or resistance to fracture and breaking. Diamond has very good durability, but due to its directional hardness diamonds have certain planes of weakness along which they can split or break. Toughness and hardness together determine the durability of diamond.
Transparency
Degree to which a diamond transmits light, directly relevant to the cloudiness or haziness of the actual diamond material, and the quality of the crystal. Click here to learn more about transparency and the DCLA Transparency Grading System.
Treated Diamond
Diamonds that are artificially enhanced, to improve either colour or clarity. These treatments fundamentally alter the diamond from its natural state, and therefore need to be fully disclosed. Click here to learn more about treated diamonds.
Trigon
Triangular shaped natural, with very fine triangular concentric lines. Trigons, when present, are a definitive indicator of natural diamonds.
Trilliant
Diamond cut or shaped into a triangle, sometimes with curved sides.
The diamond trading floor that gives all diamond buyers direct access to DCLA guaranteed diamonds from Australian diamond dealers.
latest news
Wednesday 14 July, 2010
INTERNATIONAL DIAMOND COUNCIL RELEASES IDC RULES IN RUSSIAN
The International Diamond Council (IDC) released the Russian translation of the "IDC Rules for Grading Diamonds" today in Moscow, on occasion of the 34th World Diamond Congress, the biennial congress of the World Federation of Diamond Bourses (WFDB) and the International Diamond Manufacturers Association (IDMA).
Thursday 1 July, 2010
ZIMBABWE DEFIES BAN OF MARANGE DIAMONDS
Zimbabwe’s government has resolved to defy a diamond sale ban ruled by the world approving authority, the Kimberly Process and will now begin exporting diamonds from its Chiadzwa fields.
Monday 10 May, 2010
DIAMOND PRICE INDEX PUBLISHED FOR CONSUMERS
For the first time ever, diamond jewelry consumers are going to have a diamond retail benchmark that will guide them in how much they should pay for a diamond.