Nucleated pêrels word in twee dele verdeel, die kern en die nacr, van binne na buite. Die binneste laag is die kern. Die nacre is 'n kristal van keratien- en kalsiumkarbonaat wat op die oppervlak van die pêrelkern of vreemde liggaam gevorm word deur die afskeidings van die pêrel -oester tydens verbouing of […]
Skrywer Argiewe: Kingjy
There are many places where pearls are produced in the world. Natural pearls are mainly produced in the Persian Gulf, Red Sea, South Pacific, Gulf of Mexico, ens. They can be divided into Eastern Pearl, Suidelike Pêrel, Australian Pearl, Southern Ocean Pearl, Black Pearl, Oriental Pearl, ens. Due to pollution, the yield and quality of […]
The quality evaluation method of pearls can be said to be very systematic and scientific, just like the 4C grading of diamonds. The international evaluation of pearl quality mainly includes the following aspects: kleur, glans, deursigtigheid, tekstuur, vorm, grootte, ens. In the case of cultured beads, there is also the problem of the thickness of […]
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 million years ago, 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 […]