Since the "Τιτανικός" movie hit, when everyone knew that the heart of the sea gem in the movie was tanzanite, it attracted the attention of the jewelry market, and tanzanite became more popular. As the zoisite to which tanzanite belongs, its origin is scattered in many places in Europe and Australia, but the main origin [...]
Αρχείων κατηγορίας: Νέα
Olivine is a magnesium-iron silicate mineral, belonging to the orthorhombic crystal system. Ο δείκτης διάθλασης είναι 1.654-1.690, and the birefringence difference is quite high as 0.036. From the table of the gemstone, the ridgelines of the bottom facet become overlapping The double shadow is because of the high birefringence difference, ο ρυθμός διασποράς είναι 0.020, [...]
Before the development of synthetic technology, the scientific name of hyacinth zircon is the closest natural gemstone to diamond, so zircon can be said to be the earliest natural substitute for diamond, because it has a fairly high refractive index and its dispersion rate is close to that of natural diamonds. Compared with diamonds, ο [...]
Moonstone is a kind of Feldspar gems of Feldspar. Feldspar and quartz are very common and very important minerals in the earth's crust. According to the characteristics of feldspar, it can be divided into Orthoclase and Plagioclase. Moonstone is a kind of orthoclase, με δείκτη διάθλασης του 1.518-1.526, διαφορά διπλής διάθλασης του 0.005, ένα [...]
Calcite is a calcium-containing carbonate mineral. It is a very important mineral in the earth's crust. It is often used as a teaching material to explain the characteristics of gems, but it is rarely used as jewelry because it has a very high birefringence difference and a perfect solution. Λόγος, although other gems also have [...]
In the gem trade, "καράτι" is often used as the unit of quality. The term carat, originally in Greek, means the seed of a kind of "carob tree" that grows on the Mediterranean coast of Europe. The ancients believed that the quality of each seed was the same, so it was used as a weight [...]
Humans have been searching, mining and using gemstones for nearly 6000 έτη. Για παράδειγμα, the famous Chinese "Hetian Jade" has been discovered as early as the primitive society. Σύμφωνα με ελλιπή στατιστικά στοιχεία, υπάρχουν περισσότερα από 600 kinds of gem mines discovered and mined in the world, and these gem resources are mainly distributed in [...]
Among the five continents, Asia is not the continent with the most gem varieties and production. The other four continents have their own strengths. 2. Africa The African continent is extremely rich in gem production and is known as the richest gem warehouse on earth. The main gems are diamonds, σμαράγδα, tanzanites, χρυσά σμαράγδια, ρουμπίνια, [...]
Η δύναμη της διασποράς διαφορετικών πολύτιμων λίθων είναι διαφορετική. Συνήθως εκφράζεται από τη διαφορά μεταξύ του δείκτη διάθλασης που μετράται με το κόκκινο φως στα 686,7 nm και του μωβ φωτός (460.8nm 1), και ονομάζεται τιμή διασποράς. Γενικά, η τιμή διασποράς είναι μεγαλύτερη από 0.03 ονομάζεται ισχυρή διασπορά. Colorless or light-colored gems with strong dispersion can [...]
1. Helps identify gem species There are special inclusions in some gems, και τα είδη των πολύτιμων λίθων μπορούν να προσδιοριστούν μελετώντας αυτά τα εγκλείσματα. Για παράδειγμα, Τα ρουμπίνια περιέχουν συχνά σωματίδια ρουτιλίου σε σχήμα βελόνας, και τέμνονται στο 60 γωνίες. Αυτό καθορίζεται από τη συμμετρία του ίδιου του ρουμπίνι. Επομένως, it is a unique inclusion of [...]