Modernist Studio 1980 Cocktail Rg 14Kt 26 Cts Agate

Modernist Studio free shaped cocktail ring. Outstanding modernist cocktail ring, created in Europe back in the 1980's. This unusual sculptural ring has been crafted with an free shape oversized look in solid yellow gold of 14 karats with brushed and high polished finishes. It is embellished with a large natural earth mined agate. This is a gorgeous ring with impressive look. Fire Agate Fire agate is a variety of chalcedony, is a semi-precious natural gemstone discovered so far only in certain areas of central and northern Mexico and the southwestern United States (New Mexico, Arizona and California). Approximately 24-36 million years ago these areas were subjected to massive volcanic activity during the Tertiary Period. The agates were formed during this period of volcanism when hot water, saturated with silica and iron oxide, repeatedly filled cracks and bubbles in the surrounding rock. Fire agates have beautiful iridescent rainbow colors, similar to opal, with a measurement of hardness on the Mohs scale of between 5 and 7 which reduces the occurrence of scratching when polished gemstones are set in jewelry. The vibrant iridescent rainbow colors found within agates, created by the Schiller effect as found in mother-of-pearl, is caused by the alternating silica and iron oxide layers which diffract and allow light to pass and form an interference of colors within the microstructure layering of the stone causing the effect for which it is named. Fire Agate: Mount i