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Arhivele de categorii: Știri despre bijuterii
Our country’s jewelry industry has a long history and brilliant culture. According to archaeological findings, ancient Chinese ancestors began to use gold to make jewelry in the Shang Dynasty. De exemplu, in the mid-Shang tombs of Liujiahe, Pinggu County, Beijing, two imitations of golden arm rings and one gold earring were unearthed; in Xishilou Gold […]
According to the traditional psychology and consumption customs of different countries (ethnic groups), diamante, rubine, safire, smaralde, high-quality cat’s eyes, alexandrit, opale negre, and extra-grade jade are usually listed as high-grade gemstones. Their prices are extremely expensive, a few per carat. The prices range from thousands to tens of thousands of dollars, and the prices […]
To determine the relative density of gemstones is to use Archimedes’ principle, and a precise balance can be used to determine the quality of gemstones and the buoyancy experienced. De exemplu, if a gemstone with unknown name has a mass of 5.2 grams in the air and 3.3 grams in water, its buoyancy is 5.2 […]
An important indicator to measure the effect of wax setting is the stability of gemstones. The gemstones after wax setting cannot show discoloration, cracare, chipping and other problems. Because in the wax setting casting process, gems must withstand the thermal shock of high-temperature roasting and high-temperature molten metal during casting, the gems must be able […]
The first situation occurs mainly because some gemstones are not suitable for wax setting casting. Gemstones with developed fissures are likely to change color after being subjected to high temperature and thermal shock. Some gems (such as amethyst, topaz albastru, citrină, etc.) are unstable in color when exposed to heat, so this type of gem […]
Incluziunile sunt formarea de minerale, datorită condiţiilor fizice şi chimice interne diferite, defectele de rețea cauzate de o altă substanță sunt umplute, și forma rezultată a unui material independent de mineralul principal în sine. Caracteristicile sale esențiale sunt: cel fizic, proprietățile chimice și forma de apariție sunt independente de mineralul purtător, şi […]
În vremurile moderne, când știința și tehnologia sunt avansate, majoritatea numelor de pietre prețioase au semnificații precise. Rubin (Numele englezesc Ruby) este definită ca o piatră prețioasă de corindon roșu. Orice altă piatră prețioasă roșie, oricât de strălucitor și drăguț ar fi, nu poate fi apelat “rubin”. Nu poate fi decat numit “Piatra Rosie XX”. The evolution of the term […]
Cu toate acestea, this pair of gem “surori” is not like the “husband and wife mine” realgar and orpiment, the “twin mine” galena and sphalerite often coexist together, but often live on one side. The reason is that the two are formed in different environments: rubies are mostly produced under geological and geochemical conditions that are high […]
Conform datelor din Hong Kong și Taiwan, China: Pe piata internationala de bijuterii, prețul rubinelor de înaltă calitate care cântăresc mai mult de 10 ct este de două ori mai mare decât al celor mai bune diamante sau smaralde. Compoziția chimică a rubinului și a safirului este oxid de aluminiu (AI. 0,), care ar trebui să fie incoloră când este pură. Dar în natură, […]