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Diamond is not only harder than any other natural gem, it’s also a lot harder than any natural or manufactural simulant. Diamond’s exceptional hardness makes it possible to achieve very sharp facet junctions and superior polish.

A simulant’s comparative softness means that its facet junctions always appear more rounded than a diamond’s. And most simulants quickly show signs of wear, with scratches and visible abrasions.

Diamond’s capacity for a superior polish gives it much higher luster than a simulant. Even a new, well-polished simulant can’t equal the luster of a clean diamond in good condition.

Photo: Peter Johnston/GIA. Courtesy: GIA. Resource: #Amanda#eClarity