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Moonstone cabochon. The most common moonstone is of the orthoclase feldspar mineral adularia, named for an early mining site near Mt. Adular in Switzerland, now the town of St. Gotthard. [1] [better source needed] A solid solution of the plagioclase feldspar oligoclase +/− the potassium feldspar orthoclase also produces moonstone specimens.
Sandakada Pahana, also known as Moonstone, is a unique feature of the architecture of ancient Sri Lanka. [ 1 ] [ 2 ] [ 3 ] It is an elaborately carved semi-circular stone slab, usually placed at the bottom of staircases and entrances.
Adularescence in a moonstone cabochon, Minas Gerais, Brazil. The specimen's diameter is 23 mm (0.91 in). Adularescence (/ ˌ æ dʒ ə l ə ˈ r ɛ s ən s / AJ-ə-lə-RES-əns) is an optical phenomenon that is produced in gemstones like moonstone. The optical effect is similar to labradorescence and aventurescence.
Color chips or color samples from a plastic pellet manufacturer that enables customers to evaluate the color range as molded objects to see final effects. A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or ...
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Korawakgala, or koravakgal (Sinhala: කොරවක්ගල) (wingstones), are stone balustrades, which are located on either side of the stairs/steps leading to the entrance or door of a religious building or structure.
This shared word is part of a large family of similar terms found throughout the Mediterranean and Asia. The ultimate source of these word may lie in a now lost Indo-Iranian form. [5] In Pliny’s Natural History, iaspis is a generic term that encompasses fourteen types of gemstones. This makes it difficult to determine the identity of the ...
The color in yellow chrysoberyl is due to Fe 3+ impurities. [ citation needed ] Although other minerals such as tourmaline , scapolite , corundum, spinel and quartz can form "cat's eye" stones similar in appearance to cymophane, the jewelry industry designates these stones as "quartz cat's eyes", or "ruby cat's eyes" and only chrysoberyl can be ...