INCLUSIONS FREQUENTLY SEEN IN CVD GROWN SYNTHETIC DIAMONDS

Inclusion in a CVD grown diamond

Black inclusions (likely non-diamond carbon) ranging in size from pinpoints to large ‘crystals’ are a common feature in CVD grown diamonds.

 

Inclusion in a CVD grown diamond

Black inclusions (likely non-diamond carbon) ranging in size from pinpoints to large ‘crystals’ are a common feature in CVD grown diamonds.

 

 Inclusion in a CVD grown diamond

A comet-like tail formed as growth continued on after a black inclusion disturbed the structure of this CVD diamond.

 

 Inclusion in a CVD grown diamond

A comet-like tail formed when growth continued after the appearance of a black inclusion disturbed the formation of this CVD diamond.

 

 Inclusion in a CVD grown diamond

Feathers are commonplace in CVD grown diamonds. Their appearance can usually be described as bright, whitish, frosted or thick.

 

 Inclusion in a CVD grown diamond

Feathers are commonplace in CVD grown diamonds. Their appearance can usually be described as bright, whitish, frosted or thick.

 

 Inclusion in a CVD grown diamond

The series of bright white feathers in this CVD diamond are a familiar scene but provide little assistance in the identification of origin.

 

 Inclusion in a CVD grown diamond

A more magnified view of the bright white feathers pictured to the left.

 

Inclusion in a CVD grown diamond 

A cloud of black inclusions arranged in a single plane provides a trace to the layered growth and stop-start cycles of CVD synthesis.

 

 Inclusion in a CVD grown diamond

A planar cloud of small whitish inclusions with ‘tails’ provides a clue to the direction of growth of this CVD diamond. This feature likely developed during the stop-start cycle of CVD growth.

 

 Inclusion in a CVD grown diamond

A single sharp plane of graining is a familiar scene in faintly colored CVD grown diamonds.  Though origin identification cannot be proved solely on planar inclusions and graining, they are distinct remnants of CVDs layered past.

 

 Inclusion in a CVD grown diamond

A single sharp plane of graining is a familiar scene in faintly colored CVD grown diamonds.  Though origin identification cannot be proved solely on planar inclusions and graining, they are distinct remnants of CVDs layered past.

 

 

 

INCLUSIONS FREQUENTLY SEEN IN HPHT GROWN SYNTHETIC DIAMONDS

 Inclusions in HPHT grown diamond

By far, the most frequent characteristic in HPHT grown synthetics are opaque metallic inclusions; a remnant of their origin in molten metal flux.