Diamond (Laser-Drilled) | Gemopedia

In light or colorless gemstones, dark inclusions are more easily seen than colorless ones, so a means of lightening dark inclusions was developed using lasers. In laser drilling treatments, a narrow channel is laser drilled from the stone's surface to the dark inclusion. Once the open channel has been created, a mixture of boiling acid is introduced under pressure and the inclusion is subsequently bleached or dissolved.
Colors
Colorless, Gray, Light Yellow, Light Brown

Diamond (Laser-Drilled) Classification

Common Name

Diamond (Laser-Drilled)

Species

Diamond

Variety

Laser-Drilled Diamond

Colors

Colorless, Gray, Light Yellow, Light Brown

Alternate Names

Gemstone Groups

Key Separations

polish luster, OTL RI, SR nature, flash effect in darkfield illumination, magnification, positive reaction to diamond tester

Comments

Diamond (Laser-Drilled) Optical Properties

Transparency

Transparent - Opaque

Refractive Index

2.417-0

Birefringence

Optic Character

NA

Optic Sign

NA

Polariscope Reaction

Singly Refractive (SR)

Fluorescence

SWUV: Variable
LWUV: Variable

CCF Reaction

Pleochroism

None

Dispersion

Comments

Diamond (Laser-Drilled) Chemistry & Crystallography

Chemical Name

carbon

Chemical Formula

C

Synthesis

Crystal System

Cubic

Classification

Nature

Natural

Crystallinity

Crystalline

Comments

Diamond (Laser-Drilled) Characteristic Physical Properties

Hardness

10

Streak

Specific Gravity

3.51-3.53 Typical:3.52

Toughness

Varies

Inclusions

The stones will have laser drill holes that reach the surface and sometimes appear similar to wormhole like channels. The holes can be differentiated from natural etch channels because natural channels will have a geometric structure. Stones will have bleached white inclusions. If stones are glass filled they will display flash effect or interference color flash in darkfield lighting. Inclusions in these stones are typically trapped gas bubbles, cloudy or discolored material in fractures, crackled or web-like texture.

Luster

Adamantine

Stability

Very Good

Fracture

Step-Like

Cleavage

Perfect, in four directions

Comments

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