What is the material of Taoist rosary?

Is it practical experience according to the past? Crystal material is the best.

Crystal stone is also called quartz stone. The oldest name in China is "Shuiyu", which means jade like water. In Buddhist books, crystal clear and bright crystal is called "watery spirit". It is believed that crystal will flash magical light and can be used by all beings, and it is honored as "Bodhisattva Stone". The crystal is crystallized in a natural environment with a certain temperature and pressure, and its composition is silicon dioxide. Most of the colors are colorless and transparent (purple, brown, green, gold filiform, coral and other different forms are formed when a small amount of impurities are mixed in the crystallization process due to environmental changes), the hardness is about 6-8, and the melting point is 17 13℃. Pure natural crystal is the best optical material. Today, due to the various packages and vivid images in the crystal body, it is very valuable for viewing and collecting.

Physical and chemical properties of crystals

1. Hardness: Mohs hardness is 7, which is equivalent to the hardness of a steel file, and dwarfs fragile gems such as topaz, opal and emerald.

2. cleavage: no. Cleavage refers to the property that when minerals are hit, they often crack in a certain direction regularly to form a smooth plane. According to the complete degree of cleavage, it can be divided into five categories: extremely perfect cleavage, perfect cleavage, moderate cleavage, imperfect cleavage and no cleavage, while crystal belongs to no cleavage.

3. Fracture: Shell-shaped. Fracture is also called fracture. It means that minerals only break irregularly after being hit, and the irregular fracture surface is called fracture. According to the fracture shape, it can be divided into shell-shaped and serrated.

4. Specific gravity: The specific gravity of the crystal is 2.56-2.66g/cm3. The weight of crystal with the same volume is 2.56-2.66 times that of water with the same volume, and the density of bulk crystal may be slightly higher.

5, streaks: colorless. The color of mineral powder is called stripes. It can eliminate false colors, weaken other colors and keep its own color, which is one of the more reliable identification features than mineral colors.

6. Transparency: transparent and translucent. The transparency of minerals is called transparency. The transparency standard of crystal is that when light passes through crystal fragments or slices with a thickness greater than 1 cm, the reflected image can be clearly seen. If the bottom image is not clear enough and only the outline is seen, it is translucent.

7, luster: glass luster. Gloss refers to the ability of mineral surface to reflect light. To observe the luster of a crystal, you can hold it in your hand and look at the surface reflection through the light projected by a lamp or window. The brightness of transparent crystal is related to its luster.

8. Refractive index: The refractive index of the crystal is 1.544- 1.553, which hardly exceeds this range. Refractive index refers to the ratio of sine of incident angle to sine of refraction angle when light penetrates into gem crystal from air and produces refraction phenomenon.

9. Melting point of crystal: The melting point of crystal is 17 13 degrees Celsius.