About jewelry

Jewelry refers to ornaments that used to decorate individuals and related circumstances. Jewelry represents another significant way in which people costume themselves in the effort to self-define. Jewelry is truly an illustrator of the idea of self-definition simply because much of it is entirely non-functional. The rarer the material is made from, the more value it holds. Jewelry like this is used to mark important occasions because it was considered valuable.

Thursday, May 5, 2016

Chrysoprase

Chrysoprase is considered the most valuable stone in the chalcedony group. The name (Greek — gold-leek) seems misapplied today. The microscopic fine quartz fibers have a radial structure. The coloring agent is nickel. Large broken pieces are often full of fissures with irregular colors.

Chrysoprase is rarely of green color in natural occurrences. It is often covered with a brownish crush of ferric hydroxide, and is transformed intensively into a loose mass.

It is a wonderfully durable stone that resists chipping and cracking, so it can be worn everyday. The bright color can fade if exposed to heat and sunlight but can be restored with moist heat.

Chrysoprase, like the chalcedony and opal associated with it, contains 0.2-3.3 per cent nickel, 0.02 percent cobalt, 0.03 per cent chromium, 0.01 per cent zinc, 0.03 per cent copper; 0.3 per cent sodium and 0.3 per cent potassium.

Used as cabochons, for necklaces and for ornamental objects. In earlier centuries, it was used as a luxuries decorative stone for interior decoration, such as in Wenceslaus Chapel in Prague and in Sanssouchi Castle in Potsdam near Berlin.
Chrysoprase

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