Semi-precious

Type of stone Semi-precious, ornamental Prevalence (Deposits) China, New Zealand, Russia, USA Varieties Lantian, Nanyang,

Rule 1. Sense of proportion One of the most important principles of jewelry etiquette is to respect the sense of

Gold is a universal metal. It is used not only in jewelry, but also

There are many known precious crystals that differ in color, structure and properties. Known among

Nitric acid is a strong monoprotic acid with a pH of about 3.01. It's a sticky molecule

Physical and Chemical Properties Onyx is a fibrous variety of quartz, rich in impurities. By many indicators

Type of stone Semi-precious, ornamental Prevalence (Deposits) Armenia, Brazil, Georgia, India, Mongolia, Russia, Tajikistan Varieties

This mineral is especially popular among professionals and amateurs. It is radioactive, but is necessary for the esoteric community.

Quick links with prices: 5 rubles | 7 rubles 50 kopecks | 10 rubles

Physical and chemical properties Zircon in chemical composition is zirconium orthosilicate containing from