Is volcanic glass rough a type of gemstone?

Volcanic glass rough (volcanic glass) is not a gemstone, but a vitreous structural rock.

Volcanic Glass Rough is a glassy rock formed by the lava erupted by volcanoes, which quickly cools and does not have time to crystallize. There is no definite shape, and some are pearl-shaped, stomatal or irregular. Due to the high viscosity and low temperature of acidic molten slurry, it is easier to form vitreous under rapid cooling conditions, so volcanic glass rock is mainly acidic, with a hardness of more than 8.

Volcanic glass can either alone (or predominantly) make up volcanic rocks, such as perlite.

Pine resinite, obsidian, etc. It is also commonly produced in volcanic rock matrices, filled between microcrystalline minerals, and can also be produced in vitrular tuff as clastics. With the exception of thin edges, volcanic glass is opaque and comes in a variety of colors.

No. Volcanic glass is mostly the product of the later stage of mafic volcanic eruption, with small specific gravity, medium to small hardness, easy weathering, large quantity, and can be made into handicrafts, but there is little room for value preservation and appreciation.

Gemstones are characterized by a certain crystal shape, bright color, large hardness, less output, and large room for value preservation and appreciation. Volcanic glass does not fit the inherent definition of a gemstone.

It can be said that glazed stone is also made into various jewelry

Yes, but it's pretty rare.

Volcanic rough stones generally include pearls, amber, jade, jade, Hetian jade, turquoise, diamonds, sapphires, rubies, etc.

Volcanic stone is commonly known as pumice stone or porous basalt, is a functional environmental protection material, is a volcanic eruption by volcanic glass, minerals and bubbles formed of precious porous stone, volcanic stone contains sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt and molybdenum and other dozens of minerals and trace elements, no radiation and has far-infrared magnetic waves, after the volcanic eruption, after tens of thousands of years, human beings found that it is valuable. Now its application field has been expanded to construction, water conservancy, research and high grinding, filter materials, barbecue charcoal, landscaping, soilless cultivation, ornamental products and other fields, playing an important role in all walks of life.

When the magma hits the seawater, the magma cools quickly to form a vitreous rock because the magma is hot and the water temperature is low.

Magma Linglukai is a high-temperature, complex silicate melt deep in the earth's crust. The physical properties of this melt are peculiar, it resembles both a hard solid and a soft liquid. Like red-hot glass, it flows and bends, but it is very hard and dense.

Thus, in Greek, the original meaning of magma meant something that could be rubbed"dough"。In this kind"dough"It contains a wide variety of metallic, non-metallic, and other gaseous components. Almost all the chemical elements on Earth can be found in magma.

Magmatic petrology argues:

Magma is divided into primary magma and regenerated magma.

Primary magma is formed from molten material trapped by the Earth's core. The Earth's core traps molten material and some other materials to form a huge thick molten layer. The composition of these substances is uneven. The primary magma solidified to form the most primitive earth's crust.

All kinds of intrusive rocks seen in our town zone, such as ultramafic rocks, mafic rocks, neutral rocks, acid rocks and alkaline rocks, as well as various magma eruptions from volcanoes, are all regenerative magma, but the depth of the channel, the material composition of the channel and the degree of differentiation are different.

Regenerated magma includes magma mutated from primary magma and relava magma.

The Earth's liquid layer is made up of regenerated magma formed by mutation of primary magma – formed by changes in temperature, composition, and state of matter.

Vitreous lava. Volcanic stone is a kind of vitreous lava with dense pores after the magma cools down sharply during the volcanic lead eruption, due to the sharp decrease in pressure, and the internal gas quickly overflows and expands. The volume of the stomata accounts for more than 50% of the rock volume.

It is called pumice because of its many pores, light weight, and ability to float on the surface of the water. It is characterized by high strength, heat preservation, heat insulation, sound absorption, fire resistance, acid and alkali resistance, corrosion resistance, and no pollution, no radioactivity, etc. <

Vitreous lava. Volcanic rock is a kind of vitreous lava with dense pores formed by the rapid overflow and expansion of internal gas due to the rapid decrease in pressure after the magma cools rapidly during the volcanic eruption. Its stomatal volume accounts for more than 50% of the volume of the rock.

It is called pumice because of its many pores, light weight, and ability to float on the surface of the water. It is characterized by high strength, heat preservation, heat insulation, sound absorption, fire resistance, acid and alkali resistance, corrosion resistance, and no pollution, no radioactivity, etc.