About This Book; About Presidium Synthetic Diamond Screener - PRESIDIUM Synthetic Diamond Screener Manual De Instrucciones

II. About this Book
Thank you for purchasing the Synthetic Diamond Screener by
Presidium ("SDS" or "Device").
This handbook is designed to help you set up your device and
describes all you need to know about how to use your diamond
screening device accurately and take care of it, in line with its
requirements. Please read these instructions carefully and keep them
handy for future reference.
This book also contains the terms and conditions in relation to
the use of the device including the Disclaimer, EXCLUSION and
Limitation of Liability clauses stated above in Section I.
III. About Presidium Synthetic Diamond
Screener (SDS)
The Synthetic Diamond Screener (SDS) is developed to help screen
out the Type IIa colorless diamond, which could possibly be synthetic,
from the natural Type Ia colorless diamond.
Diamonds can be classified into two Types.
Typically, Type I diamonds contain nitrogen atoms as the main
impurity and they make up almost 98% of all natural diamonds. The
usual color of Type I diamond is colorless, brown, yellow or orange but
can also be found in virtually all colors other than blue.
Type II diamonds, however, contain few or undetectable nitrogen
atoms and they make up the remaining 2% of natural diamonds.
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Within the Type II category of diamonds, they can be further classified
as Type IIa and Type IIb. Type IIa diamonds are usually the purest of
color ranging from colorless to near colorless, although they can also
be of yellow, brown, orange, pink, red or purple colour. Type IIb are
typically not colorless and are usually blue, brown or gray and contain
boron atoms as well.
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Diamond Grading ABC The Manual. 9th edition, 2007, Verena Pagel-Theisen G.G.
F.G.A
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