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Moonstone is a sodium potassium aluminium silicate ((Na,K)AlSi 3 O 8) of the feldspar group that displays a pearly and opalescent schiller. [ 1 ] [ 2 ] An alternative name for moonstone is hecatolite [ 2 ] (from goddess Hecate ).
Adularescence in a moonstone cabochon, Minas Gerais, Brazil. The specimen's diameter is 23 mm (0.91 in). 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 .
They took terminology used in the industry at the time and refined the definitions to produce a clarity scale by which diamonds could be consistently graded. [2] The system at that time contained nine grades: Flawless, VVS 1, VVS 2, VS 1, VS 2, SI 1, SI 2, I 1, and I 2. [2] The 'I' of the I 1, and I 2 grades originally stood for "Imperfect". [2]
It was first described by Ermenegildo Pini in 1781. [6] The optical effect of adularescence in moonstone is typically due to adularia. [7] The largest documented single crystal of orthoclase was found in the Ural Mountains in Russia. It measured around 10 m × 10 m × 0.4 m (33 ft × 33 ft × 1 ft) and weighed around 100 tonnes (110 short tons).
Download QR code; Print/export ... Gemstone Jewelry; Components. Cameo; Emblem; ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; ...
Jewellery design is the art or profession of designing and creating jewellery. It is one of civilization's earliest forms of decoration , dating back at least 7,000 years to the oldest-known human societies in Indus Valley Civilization , Mesopotamia , and Egypt .
Easotope software archives, organizes, and analyzes mass spectrometer data. It is currently oriented toward clumped CO 2 analysis but is also useful for bulk CO 2 work and expandable to other isotopic systems. El-MAVEN Open-source Desktop software by Elucidata processes labeled LC-MS, GC-MS and LC-MS/MS data in open-formats (mzXML, mzML, CDF).
Users upload either a complete design package, like ODB++ or IPC-2581, [4] or individual data packets, such as Gerber, Bill of Materials, and Pick and Place [5] files.. Sherlock incorporates stresses from a variety of environments into its physics-based prediction algorithms, including elevated temperature, thermal cycling, vibrations (random and harmonic), mechanical shock and electrical ...