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IMPORTANT DETECTION GUIDELINES
IMPORTANT DETECTION GUIDELINES
(CONT)
(CONT)
(Detailed instructional videos are also available.)
SIMULANTS:
Stones that do not emit light in any color (black) under our proprietary lighting are considered
simulants. (This is elaborated further in the instructional videos.)
FLASHLIGHT EFFECT:
As explained previously,
NATURAL
diamonds do not have phosphorescence. They will not glow in the
dark after the light is shut off except in rare occasions (false positive).
Sometimes we may see a diamond or diamonds that show a blue color that are also painted with
some red. In this case, we must be sure that there is no stone nearby the diamond that shows very
strong phosphorescence. These glowing stones could act like a flashlight and consequently illuminate
the natural diamond to the extent that it seems like it is glowing in the dark by itself. In this case, we
must take out the diamonds that are painted in full red and check again. Please see an example of this
in the picture section below.
HPHT lab grown diamonds will usually fluoresce in a blue color and will show a very strong
phosphorescence. In the RESULT picture, these diamonds will usually be completely painted in a
bright red color to the extent that you will not be able to see the color of the diamond. (You can see
the color of the diamond in the COLORED result.) When viewing the GLOWING picture result you can
easily identify HPHT lab grown diamonds, since they will glow very strongly in blue.
CVD lab grown diamonds will usually fluoresce in a NON-BLUE color, and they may or may not show
slight phosphorescence. In the RESULT picture it will either show a non-blue and/or some visible red
painting. When viewing the GLOWING picture result, CVD lab grown diamonds may glow. However,
the glow will be very weak as compared to the bright glow of HPHT lab grown diamonds.
IS IT A CVD OR HPHT LAB GROWN DIAMOND?
IS IT A CVD OR HPHT LAB GROWN DIAMOND?
The diamonds in the pictures you are about to see in the next few pages are positioned with the table
facing down. This is done for demonstration purposes.
When testing loose diamonds, we recommend to always position them on the pavilion side as well.
A test cannot be fully done UNLESS the diamond was checked
on both the table and on the pavilion.
A PICTURE IS WORTH A THOUSAND WORDS
A PICTURE IS WORTH A THOUSAND WORDS
So Please Pay Attention.
