DIAMOND SORTING

A great percentage of small diamonds are cut and polished in India. Not only are these exported in large quantities, the domestic consumption levels are quite high. Such diamonds, normally referred as stars and mellee, need to be assorted carefully for the purpose of categorization and hence, value ACGS provides this service for diamond merchants and buyers who look to trade in lots of sorted goods.
Assortment is carried out on the basis of color, clarity and cut.
Assortment service is provided in respect of loose diamonds for sizes above +4 sieve size only.
Minimum weight of packet accepted for assortment is 3.00 carats.

Drilled beads and strings are offered in following stones:

COLORED STONES (OTHER THAN PEARLS) – natural, untreated

Service is provided in respect of cut and polished diamonds only.
Minimum size acceptable for issuing a full report is 10 cents (0.1 carat).Grading is carried out only under controlled conditions,
Grading is carried out only under controlled conditions, keeping in view GIA standards.
Full grading report includes clarity, color, cut, fluorescence, and a plot diagram showing important clarity characteristics.
Summary grading report contains same information as the full grading report but does not include any plot diagram.
In case of doubt about the stone being a natural diamond, diamond grading report will not be issued and a fixed charge will be taken from the client.
In case a diamond has been enhanced by HPHT treatment but the same is not detected in the laboratory during routineexamination, ACGS will not be responsible for the same.
Fancy colored diamonds are graded for clarity, cut, and color; color grade is assigned as per parameters laid down by the GIA.
Methodology – Each and every Diamond is certified after a thorough analysis and study by a qualified and experienced diamond grader. Each diamond undergoes rigorous and meticulous study and analysis before preparation of the report.
Credibility – The laboratory is known for its credibility, impartiality and independence.

Service is provided for natural, cultured, and imitation pearls in loose as well as mounted form, wherever testing conditions permit.
Testing is carried out only under controlled laboratory conditions, in accordance with international gemological standards.
Pearl testing includes determination of pearl type (natural / cultured / imitation), mollusk origin where possible, structure, surface characteristics, luster, shape, color, and size.
Advanced gemological instruments and non-destructive testing techniques are used to examine nacre thickness, growth structures, surface features, and internal characteristics.
The full pearl testing report includes identification, measurements, weight, color description, luster grade, surface quality, shape, and remarks on treatment, if any.
A summary report contains essential identification details but may not include detailed structural observations.
In case of doubt regarding the authenticity or origin of the pearl, a conclusive identification may not be issued, and a fixed laboratory examination charge will be applicable.
If any treatment or enhancement is present but remains undetected during routine laboratory examination, the laboratory shall not be held responsible for the same.
Dyed, treated, or composite pearls are clearly disclosed where detected during examination.