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thermal stability and crystallinity
— Type 25: Wheel relieved and recessed on one side and relieved on the other side
The display of unit price
when the call is answered by a voice messaging systemcall answering facility
Isolation valves separate the actuation mechanism of a valve from the media being moved
Jewellery and precious metals. Grading polished diamonds. Terminology, classification and test methods not-for-sale thermal stability and crystallinity1 Scope This document specifies the terminology, classification and the methods that are used for the grading and description of single unmounted polished diamonds over 0,25 carat (ct). This document applies to natural, unmounted, polished diamonds. It is not to be used for fancy coloured diamonds, synthetic diamonds, treated diamonds (other than is allowed for in 7. 4), nor for assembled stones.