Diamond Treatments
This is an unstable/impermanent treatment sometimes used on the surface of diamonds to change the colour.
What is coating?
These are the two methods of diamond synthesis.
What are CVD and HPHT?
A "fracture filled" or drill diamond should not be used in this common piece of goldsmith equipment.
What is the ultrasonic?
All Canadian diamonds over the size of 0.30ct will have this type of identifying mark?
What is a laser inscription on the girdle?
Laser drilling and acid beaching are used together to improve or lessen the appearance of these.
What are black or dark inclusions?
Synthetic diamonds were originally produced for this purpose.
What is industrial use?
A one carat diamond is equal to this many “points”.
What is 100 points?
Based on current market trends, a synthetic diamond's value is likely to do this over time.
What is decrease in value?
Fancy colour diamonds can be created from off-colour, inexpensive natural diamonds using this treatment.
What is irradiation?
Synthetic diamond has this type of lustre.
What is adamantine?
Fire refers to this measurable optical gem feature.
What is dispersion?
Treated diamonds may be priced erratically in the market and are not likely to do this over time.
What is appreciate in value?
Filling fractures in diamond with glass is called this in the trade.
What is clarity enhancement?
Synthetic diamonds sometimes show orange fluorescence under this type of light.
What is short wave ultraviolet light?
A gem material which looks like diamond but does not have the same optical, chemical and physical properties of diamond is called this.
What is an imitation or a simulant?
Natural & synthetic brown diamonds can be altered to produce a variety of colours depending on their type by using this type of treatment.
What is HPHT treatment?
DeBeers launched a brand of CVD synthetic diamonds in 2018 called this.
What is LightBox?
This type of diamond treatment must be disclosed.
What is ALL types of diamond treatments must be disclosed?