Type IIa

Purest and Rarest



Type IIa Pure and Rare

Diamond type is a method of scientifically classifying diamonds, both grown and mined, by the level and type of their chemical impurities.

Type IIa diamonds make up 1–2% of all mined diamonds. Type IIa diamonds are almost or entirely devoid of impurities.

A colorlessPDC Diamonds is classified as type IIa which is considered to be the purest form of diamond known to man.

Many large, famous diamonds, such as the Cullinan and Koh-i-Noor, are type IIa.

A renowned example is the “Elizabeth Taylor Diamond,” formerly known as the “Krupp Diamond,” a 33.19-carat Type IIa diamond.

Physical Properties of PDC Diamonds vs Mined

Physical Properties

Hardness

Refractive Index

Specific Gravity

Dispersion

Thermal Conductivity

Thermal Expansion

Optical Transparency

Electrical Resistivity

PDC Diamonds

10.00

2.42

3.52

0.44

2000W/m/K

0.8 X 10-6 K

Deep UV-Far IR

1016 Ohm –cm

Mined

10.00

2.42

3.52

0.44

2000W/m/K

0.8 X 10-6 K

Deep UV-Far IR

1016 Ohm –cm

Type IIa Diamonds

Krupp Diamond
33.19 Carats
Elizabeth Taylor Ring
Cullinan 2
317.40 Carats
Imperial State Crown of Britain
Cullinan 1
530.20 Carats
Royal Sceptre