Do you know how hard these jade stones are?

When buying gemstones, people often say that these gemstones are very hard and the stone body is very hard, and they are very hard to say how hard it is. What can be compared with the reference? Perhaps the following content can provide you with some reference.

Generally speaking, hardness refers to Mohs hardness, which is a standard of mineral hardness. It refers to the ability of mineral rock to resist external force friction or scoring. It was founded by German mineralogist Frederick Moss in 1812. Proposed. The comparison of the Mohs hardness is to scratch the surface of the tested mineral by scratching the pyramidal diamond needle, and the hardness is expressed according to the depth of the scratch.

Mohs hardness table

Mohs hardness represents mineral reference 1 talc, graphite skin (1.5) 2 gypsum hard plastic, nail (2 - 2.5) 3 calcite, marble, copper, pearl gold, silver, aluminum (3) 4 fluorite platinum (4 - 4.5) 5 apatite glass (5.5) 6 feldspar, moonstone steel 锉 (6.5) 7 quartz, crystal zircon (7.5) 8 topaz (topaz) beryl (7.5-8) 9 corundum, ruby, Sapphire, chrome, tungsten steel silicon carbide (9.15) 10 diamond

Through the above Mohs hardness table, you must have a basic understanding of the concept of hardness, then how hard is the jade that people are familiar with?

Emerald

Jadeite is a jade-like stone polycrystalline aggregate formed under geological conditions. It is mainly composed of jade or jadeite and sodium (sodium chromite pyroxene) and soda-calcium pyroxene (omnicite), which may contain horn flashes. Stone, feldspar, chromite, limonite, etc. Its Mohs hardness reaches 6.5-7, and interested friends can use steel shovel to compare with jade which is harder, and perhaps unexpected results.

Hetian jade

Hetian jade is a kind of nephrite. In a broad sense, China's more than 98% of the tremolite components are named Hetian jade, and the chemical composition is water-containing calcium magnesium silicate. Although Hetian jade is a kind of nephrite, his hardness is not low, and the Mohs hardness reaches 6 to 6.5. Under normal circumstances, the glass can still be scratched on the glass.

South red agate

The main component of the red agate is silica, and the Mohs hardness is 6.5-7, which is also a kind of gemstone with relatively high hardness.

turquoise

Turquoise, also known as "Song", is a phosphate mineral aggregate of copper and aluminum. It has the most distinctive characteristics of opaque azure blue. It produces high-quality turquoise in the areas of Jixian, Luxi and Zhushan in Hubei, China. For 5~6, the hardness is not too high.

In addition to the traditional gemstones known throughout the country, many famous gemstones are also very popular in China. In this small series, a simple gem hardness introduction is introduced, and interested friends can refer to them.

Tanzanite Mohs hardness: 6-7

Tourmaline Mohs Hardness: 7-8

Emerald Mohs hardness: 7.5-8

Opal Mohs hardness: 5-6

Crystal Mohs hardness: 7

Lapis Mohs hardness: 5-6

Amber Mohs hardness: 2-2.5

The hardness of gemstones as an important characteristic parameter of them, people will consider it when choosing which gemstone, but the high hardness does not mean that they are difficult to damage. For the collection and preservation of gemstone, it is still necessary to examine the structure. , brittleness, etc., so the precious gemstone needs to be properly kept to avoid losses.

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