"Why should you be wide-minded and wrestle around the wrist?"…
Opal's English is Opal, which originated from the Latin Opalus, meaning "the beauty of the gem." Ancient Roman natural scientist Pliny once said: "On an opal stone, you can see the ruby ​​flame, the amethyst-like stains, the emerald…
1. Sodalite from the same family of lapis lazuli: belongs to the group of sodalite minerals, usually blue, a few white, green, red, purple or gray, Mohs hardness of 5.5~6.0, density It is 2.15~2.35, and the refractive index is 1.48~1.487. Crystals are rare and are …
The “semi-precious stone†material not only shines in the design of top jewellery, but also invests in the upstart of the collection industry. With the great trend of fame in the jewelry industry, its value is not what it used to be. The price from ore …
