DFHK












 







Talk For Consumers


 Q: Who and when founded DFHK Laboratory?

A: DFHK (Diamond Federation of Hong Kong, China Ltd.) founded DFHK Laboratory and registered in December 2003.



Q: What is a diamond?


A: A diamond is a mineral composed essentially of carbon crystallized at extremely high temperatures and pressures; in nature, diamonds form 150 to 200 kilometers or more below the earth's surface. Diamond is the hardest of all known natural substances (10 on the Mohs scale); its refractive index is 2.417, dispersion 0.044, specific gravity 3.52, and its luster is adamantine. Diamond forms in the cubic, or isometric, crystal system, has four directions of perfect octahedral cleavage, and shows a step-like fracture surface. Its color ranges from colorless to yellow, brown, gray, orange, green, blue, white, black, purple, pink, and, extremely rarely, red. Transparent and near-colorless in a desirable color, diamond is a highly valued gemstone; poorly colored or heavily included single crystals are used for a wide variety of industrial purposes; polycrystalline material is crushed and used as an abrasive powder.



Q: What are the DFHK “Five Cs” of diamond quality?

A: The key to a diamond’s value is its rarity, and no two diamonds are alike. Rarity is determined by a diamond's unique characteristics as measured by the Five Cs: Cut, Color, Clarity, Carat Weight and Confidence. Using these criteria, a small diamond of exceptional quality will likely be more valuable than a larger diamond of lower quality.



Q: Why do we need an independent diamond grading report?

A: For the ultimate peace of mind, ask your jeweler to provide an independent diamond grading report with your diamond. The most widely used and respected reports are those issued by the independent DFHK Laboratory, who provides reports on the world’s most important diamonds.



Q: Which International standard follow by DFHK Lab?

A: DFHK lab standard is following GIA (Gemological Institute of America); which is the most definitive academy in the world.