Colored pearl

Details Colored pearl Colored pearl

1986-12-17

1988-11-15

Hafer, Robert A.

Jewelry

Gem

A44C 1700

Patent

active

047839759

ABSTRACT:
A cultured colored pearl comprises a concretion of layers of pearl around the invading material which is a molded article composed predominantly of powders of waste pearls, shells, waste coral and/or shells of Crustacea.

REFERENCES:
patent: 1252849 (1918-01-01), Schreurs
patent: 3075906 (1963-01-01), Chow

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