Calibration certificate of GIA international diamond
The feature of certificate of GIA diamond grade:
GIA differentiates for diamond grade and lapidary appraisal established a standard, this kind of standard becomes the fair beacon of international jewelry industry to allow.
The feature of diamond grade certificate that GIA signs and issue includes:
Diamond certificate number (Laboratory Report) : The calibration certificate number of this diamond
Date (Date) : This diamond by appraisal date
Appearance and cut modelling (Shape And Cutting Style) : With the exterior that will describe diamond and cut style
Dimension (Measurement) : Describe the volume of diamond for the unit with millimeter, wait for parameter like long, wide, tall, circumference
Carat weight (Carat) : The maund of diamond, arrive accurately normally decimally hind two, 1 carat is equal to 200 milligram or 0.2 grams
Color (Color) : The color that describes diamond differentiates grade, d expresses the most infrequent the most satisfactory level, z shows lowermost level
Spend completely (Clarity) : Use a description to be below 10 times magnifier, those who measure its spend level completely
Cut worker worker (Cut) : Come according to the openly exterior of diamond, design and craft appraisal its grade that cut worker worker. After circular diamond began to be classificationed on January 1, 2006, cut worker worker classification begin popularity to rise
Burnish (Finish) : To the overall evaluation of diamond polish and symmetry
Polishing (Polish) : The whole surface that is diamond spends assess grade glossily
Symmetrical (Symmetry) : Use at describing diamond on appearance of two side facet, and whole diamond apparent balances a gender consistently
Fluorescent (Fluorescence) : Use at the description to be below ultraviolet ray, observe the color of diamond and color intensity
Remarks (Comments) : Describe those is in the diamond characteristic that certificate had not mentioned in basic project
Spend a figure completely (Clarity Plot) : The foreign matter that puts jewel in professional microscope next observing probably size, type and positional scale and become chart
Scale chart (Proportion Diagram) : The actual scale of diamond pursues, can know the real volume of a diamond according to this graph
Teach you how to read chart of a piece of scale below, typical scale chart includes the following information:
Deepness per cent (Depth%) : Will naked the deepness that get (the height that measures to mesa from booth needle) except the average diameter that gets with the circle (or the width of beautiful type lathe work) multiply again with 100 percent.
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