image06
  • PRODUCTS
  • SERVICES
  • CONTACT

DIAMOND IRRADIATION

ELECTRON IRRADIATION

Irradiation of Diamond with accelerated electrons produces desirable coloration of the Crystals.

HPHT

HIGH PRESSURE HIGH TEMPERATURE ANNEALING

The HPHT Process can transform certain types (IIa) of brownish diamonds to white or near white color. Other diamonds (Type Ia) can be transformed to greenish, yellowish, or yellowish orange colored diamonds.

N-V CENTERS

NITROGEN-VACANCY CENTERS

Nitrogen-vacancy centers are typically produced from single substitutional nitrogen centers by irradiation followed by annealing at temperatures above 700 °C. Irradiation produces lattice vacancies, which are a part of N-V centers.

https://en.wikipedia.org/wiki/Nitrogen-vacancy_center

CLARITY ENHANCEMENT

FRACTURE FILL

Diamonds with large fracture inclusions can be processed to enhance its clarity. If the fracture opens up to the surface, glass like material with reflective index similar to that of the diamond (2.42) can be injected into the crack to diminish its appearance. Certain fracture in the diamonds can practically dissappear after this process to visually improve its clarity.

LASER DRILL

A single concentrated carbon spot in a diamond due to its multiple internal reflection can give an impression of heavy inclusions in other wise nice brilliant cystal. These spots can be bleached out by drilling microscopic tunnel and then injecting solvents to dissolve.

© US Diamond Technologies 2021 | all rights reserved.