Nikon Small World 1988 Competition Winners
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Twelfth Place, 1988 Competition John I. Koivula Gemological Institute of America Santa Monica, California, USA Inclusions of pyrolusite and limonite in polished slab of Brazilian agate (14x) Brightfield |
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Twelfth Place, 1988 Competition John I. Koivula Gemological Institute of America Santa Monica, California, USA Inclusions of pyrolusite and limonite in polished slab of Brazilian agate (14x) Brightfield |
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