The most prized of all the chalcedonies, chrysoprase, is the fine grained fibrous apple green variet
The most prized of all the chalcedonies, chrysoprase, is the fine grained fibrous apple green variety, which owes its lovely color to the presence of hydrated nickel silicate. It is rarely seen in commercial jewelry because stones of consistent color and calibrated sizes are difficult to obtain in large quantities, but this beautiful gem often seen in designer and one-of-a-kind jewelry items. -- source link
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