Properties
Mineral group: Quartz
Chemistry: SiO2
Color: Black green blue and others
Crystal system: Trigonal
Mohs Scale hardness: 7
Refractive index: 1,544-1,553
Birefringence: +0,009
Specific gravity: 2,63-2,65
Other
Quartz is a mineral in a broad sense with similar chemical composition. Quartz can be divided into two main subsets. Crystalline (macro-crystalline), the variety is generally associated with quartz. This group includes Quartz, Amethyst, Smoky Quartz, and others. The second group are polycrystalline (micro-crystalline), and have in turn several subgroups. Here we find the groups Chalcedony, Jasper, Quartzites and silicate replacements. Known examples here are Onyx, Agate, Carnelian and different varieties of jasper and Tiger’s eye.
Read/Learn more about Quarts under "Gemstoneinformation"
Chalcedony in Healing (Source: ChatGPT)
Chalcedony is a calming and gentle stone that is often associated with communication, emotional balance, and harmony. It is known for its soft, nurturing energy and is often used to promote inner peace and understanding.
Read/Learn more about Chalcedony – Healing Properties


