10 Years of Commitment, Excellence & Quality
About DGTL
DGTL (Delhi Gem Testing Laboratory) is a trusted name for the last 10 years in the Gems & Jewellery Industry. DGTL provides International standard services in the field of Gemology, Diamonds & Jewellery. DGTL offers Laboratory Testing, Training Programmes & Consultation services. DGTL is backed by a team of Qualified & Experienced Gemologists, Diamond Graders, Jewellery Designers & Market Experts.
With the proliferation of lmitation, Synthetic & Treated stones in the market, increased competition, and other market threats, it has become need of the hour to be professionally qualified & skilled to start gems & Jewellery business or to make a career in this field. Due to increased customer awareness & global competition, the market has to offer Jewellery with Better Quality, innovative designs & impeccable finishing to boost sales. DGTL has fully equipped Gem Testing Laboratory for Identification and Grading of Diamonds and Gemstones. With its quality and reliable services over the last 10 years, DGTL has become a trusted name in the Gems & Jewellery Industry.
DGTL (Delhi Gem Testing Laboratory) provides reliable & unbiased certification Reports for the safety and trust of customers. The Gems & Jewellery market has become very competitive & quality driven like never before. So, the Challenges & opportunities are enormous in this industry.
A WORLD-CLASS EDUCATION AND LABORATORY TESTING SERVICES
Remarkable Facts About Diamond
Remarkable Facts about Diamonds
- Diamond is made up of Pure Carbon. Diamond is the only gemstone present in elemental form.
- Diamond is the hardest natural mineral substance on Earth & has hardness of 10 on Moh’s Scale.
- Diamond is formed deep within the Earth at extreme conditions of Temperature & Pressure.
- Diamond comes on the upper layers of the Earth’s Crust through volcanic eruptions.
- It takes billions of years for the formation of Diamond Crystal.
- Diamonds comes in all possible colours.
- The diamond is always colorless if present in its pure chemical composition. So, the various colours in Diamonds is due to chemical impurities and crystal structure imperfections.
- Diamond has best possible lustre among all transparent gemstones called ‘Adamantine’ .
- The melting point of Diamond is 4000 Degree Centigrade.
- The Specific Gravity ( SG ) of Diamond is 3.52 .
- The Refractive Index ( RI )of Diamond is 2.417, which is one of the highest RI values among all Gemstones.
Properties of Diamond
- MINERAL: Diamond
- CHEMISTRY: Carbon
- COLOR: Colorless to Deep Colors
- Optic Character: Isotropic
- REFRACTIVE INDEX: 2.42
- BIREFRINGENCE: None
- SPECIFIC GRAVITY: 3.52 (+/-0.01)
- MOHS HARDNESS: 10