Adularescence (/ˌædʒələˈrɛsəns/ AJ-ə-lə-RES-əns) is an optical phenomenon that is produced in gemstones like moonstone. The optical effect is similar...

first described by Ermenegildo Pini in 1781. The optical effect of adularescence in moonstone is typically due to adularia. The largest documented single...

later discoveries aventurine quartz and aventurine feldspar (sunstone). Adularescence – Milky luster or iridescence originating from below the surface of...

moonstone derives from the stone's characteristic visual effect, called adularescence (or schiller), which produces a milky, bluish interior light. This effect...

term as opalescence. This milky sheen displayed by opal is a form of adularescence. Fire opal is a relatively transparent gemstone with a vivid yellow-orange-red...

minerals. It is seen in moonstone and labradorite and is very similar to adularescence and aventurescence. GIA Gem Reference Guide. Gemological Institute of...

irrespective of angle Dichroic filter Dichroism Iridocyte Labradorescence (Adularescence) Metallic colour Opalescence Structural colour Thin-film optics Nacre...

Labradorite Labradorite in a polished rock slab General Category Adularescence, tectosilicate Formula (repeating unit) (Ca,Na)(Al,Si)4O8, where Na is...

show a play of color.[clarification needed] Opalescence is a form of adularescence. For gemstone use, most opal is cut and polished to form a cabochon...

orthoclase feldspar that exhibits a rare combination of aventurescence, adularescence, and a distinctive iridescence lattice pattern. The iridescence lattice...