Die kwaliteit evalueringsmetode van pêrels kan gesê word dat dit baie sistematies en wetenskaplik is, net soos die 4C-gradering van diamante. Die internasionale evaluering van pêrelkwaliteit sluit hoofsaaklik die volgende aspekte in: kleur, glans, deursigtigheid, tekstuur, vorm, grootte, ens. In die geval van gekweekte krale, daar is ook die probleem van die dikte van [...]
Kategorie -argiewe: Juwele nuus
Akwamaryn (Akwamaryn), die minerale naam is beryl, is 'n beryl met baie ysterelemente, as 'n langdurige edelsteen, in die 19de eeu, mense het akwamaryn as amulet gebruik om matrose te beskerm. Aquamaryn het ook 'n paar historiese legendes wat verweef is met verwagtinge en bygelowe. Dit is lank reeds beskou as 'n simbool van geluk en ewige jeug, [...]
cryptocrystalline quartz jade. Chalcedony and agate have a very long history. Oor 100 miljoen jaar gelede, underground magma spewed out due to the changes in the earth's crust. When the lava cooled, steam and other gases formed bubbles, and the bubbles were sealed when the rock was frozen to form many holes. After a long [...]
German glasses brille extends from beryl, omdat die vroegste brillense met kleurlose beryl gemaal is. The color of beryl gemstones is one of the classification criteria. (1) Smarag. With chromium or iron as the color characteristic, green beryl with emerald green color can be slightly yellow or blue, and its typical characteristic is the [...]
(1) Kleur. The best emerald color is that strong emerald green with a little blue tone, that green will make people unforgettable. Positive green and slightly yellowish grass green are also very good, while dark green and light green are inferior colors. (2) Helderheid. The clarity of emeralds is generally not very good, with large [...]
The main varieties of chrysoberyl gemstones, cat's eye and alexandrite, are important precious gems in the world. In addition to cat's eye and alexandrite, chrysoberyl gemstones also include chrysoberyl, which refers to gold that does not have the discoloration effect and the cat's eye effect. Emerald gems. Onder hulle, there are no special optical effects, [...]
In 1830, 'n juweel wat van kleur verander het, is in die Oeralgebergte in Rusland ontdek, naamlik alexandriet. Hierdie dag was toevallig die verjaardag van keiser Caesar Alexander II van Rusland, daarom het hy hom Alexandriet genoem na die keiser van Rusland. Dit is ook genoem "alexandriet" in die mark. The color of alexandrite changes with [...]
(1) Kleur. The beeswax yellow is the best, gevolg deur groen, geel-groen, yellow-brown, gray-green and gray-yellow again. When the light illuminates the gemstone from the side, half of the cat's eye is its body color, and the half becomes other colors, which is also a good performance. As for cat eyeliner, the brighter and more [...]
Spesiale graad produk: groen, geel-groen, met 'n paar krake en onsuiwerhede, deurskynend, en die gewig is bo 50kg. Eersteklas produk: akwamaryn, liggroen, geel-groen, met 'n paar krake en onsuiwerhede, deurskynend, en die gewig is meer as 10 kg. Tweede graad produk: akwamaryn, liggroen, geen krake nie, 'n bietjie onreinheid, en 'n blok gewig bo 5 kg. Derde [...]
Opale kan in vier kategorieë ingedeel word in terme van hul liggaamskleur: wit opale, swart opale, vuuropale en glasopale. 1. White opal The body color of white opal is milky white, en kan 'n paar ander kleure hê, soos pienk en liggeel, maar oor die algemeen is dit steeds wit, changing the [...]