What Colour would a brown Type II diamond become if HPHT treated?

How can you tell if a diamond is Hpht?

HPHT synthetics can be identified by their distinctive fluorescence patterns using the DiamondView luminescence imaging instrument, the lack of “strain” (anomalous birefringence) when viewed through crossed polarizers, and to a lesser extent by the detection of various features in photoluminescence (PL) spectroscopy.

What does Hpht attempt to?

According to the Israeli Diamond Industry portal, HPHT, or High Pressure High Temperature, is an attempt to mimic the natural environment which produces diamonds 150km deep in the earth’s crust, under extreme heat and pressure – some 2000 degrees Celsius and 58,000 atmospheres – with aim of changing the crystal …

Are HPHT diamonds Type IIa?

HPHT deals with Type IIa diamonds which have no nitrogen and are colourless. These Type IIa diamonds due to crystal lattice defects sometime show brown colour. … However, AnchorCert has invested in the latestest technology which can help identifiy HPHT-treated diamonds.

Are HPHT diamonds bad?

Purchasing HPHT diamonds is not recommended for several reasons. … HPHT can only be used on high-clarity diamonds (VVS1, VVS2, VS1, VS2, and flawless) because the extreme pressure and temperature can cause diamonds with inclusions or fractures to explode during the process.

What is HPHT treatment?

HPHT stands for a high-pressure, high-temperature. This treatment is an effective tool for changing the color of certain diamonds, making them colorless, pink, blue, green, yellowish green, or yellow. Outside of a well-equipped grading laboratory, this form of diamond treatment is virtually undetectable.

IT IS AMAZING:  What kind of figurative language is diamond in the rough?

What is a Type 2 a diamond?

Type IIa diamonds have no measurable nitrogen or boron impurities. They are the most chemically pure diamonds and have the highest thermal conductivity. Type IIa diamonds are often colorless or near colorless. They can also be gray, light brown, light yellow, or light pink.