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Publication
For many people, the concepts of "rock" and "mineral" are not distinguishable. All minerals and mineral aggregates are used to call the capacious word "stone", without going into details what exactly is meant.
All the cuts that were used to cut diamonds before the invention of the modern diamond cut are called old diamond cuts.all the cuts that were used to cut diamonds before the invention of the modern diamond cut are called old diamond cuts.
Fancy diamonds are called diamonds that are richer and brighter than the Z standard in a series of D-Z colors.
"Jewish" stone, it is also written granite, is a pegmatite rock, the bulk of which is feldspar from pinkish to beige in color, and inclusions are represented by quartz.
High characteristics for diamonds are considered colors above G (4), that is, D, E, F, and quality above VVS2 (3), that is, Fl, IF, VVS1.
