A friend gave me a stone, can you explain the stone? It seems to be a volcanic stone.

It is a volcanic stone and can float on it.

Volcanic stone is a glass paper lava with dense pores formed by the rapid cooling of magma during volcanic eruption, due to the sudden decrease in pressure and the rapid overflow of internal gases and expansion. The volume of stomata in volcanic stone accounts for more than 50% of the volume of the rock, and there are many voids, light weight, and can float on the water surface, so it is also called pumice.

What is Volcanic Stone.

Generally, the color of natural volcanic stone is red, black, blue-gray socks, blue, etc., and the proportion of different colors is also different, and the use will be different, for example, when the volcanic stone of the footstone is black, the blue and blue-gray volcanic stone is mostly used for ornamental jewelry, and the microporous and red volcanic stone will be used in the aquarium.

The reason why volcanic stone is used in all fields of life is because of its characteristics and advantages are quite obvious, volcanic stone has many pores, light weight, high strength, heat preservation, heat insulation, sound absorption, no pollution, corrosion resistance, and is an ideal material for energy conservation and environmental protection.

How to distinguish volcanic stones

The appearance color of natural mineral volcanic stone is relatively dull, and if you look closely, you will find that the color, appearance and pore structure of each volcanic stone are different, and there will be a small amount of marginal minerals mixed into it, so sometimes it is not beautiful, and some bright colors and consistent pores are mostly fake volcanic stones.

Vitreous lava. Volcanic stone 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.

Appearance shape: no sharp granularity, low resistance to water flow, not easy to block, uniform water and air distribution, rough surface, fast hanging film speed, microbial film is not easy to fall off when repeated washing.

Porosity: Volcanic rocks are naturally honeycomb porous, which is the best environment for the growth of colloids.

Mechanical strength: According to the national quality inspection department, practice has proved that it can withstand the hydraulic shear action of different strengths, and the service life is far longer than that of other filter media.

Density: The density is moderate, it is easy to suspend and do not run out of material during backwashing, which can save energy and reduce consumption.

Biochemical stability: Volcanic rock biological filter media is corrosion-resistant, inert, and does not participate in the biochemical reaction of biofilm in the environment.

Surface disturbance and hydrophilicity: The surface of the volcanic rock biological filter material has a positive charge, which is conducive to the sessile growth of microorganisms, strong hydrophilicity, and the amount of attached biofilm is large and fast.

Effect on biofilm activity: As a biofilm carrier, volcanic rock biological filter material is harmless and has no inhibitory effect on the immobilized microorganisms, and it has been proved in practice that it does not affect the activity of microorganisms.

Hello, your stone is not calcite, it should be crystal.

Calcite has parallel cleavage, layer upon layer! Looking through the thin, clean calcite, one strand of hair becomes two, which is formed by the refraction of calcite. In addition, the hardness of calcite is very low, and it can be cut with a steel knife.

The composition of the crystal is silicon dioxide. If you put good quality crystals in clean water, we generally can't see the crystals! It shows that the crystal is extremely pure, pure and pure as pure water. Crystal has a high hardness and can easily cut through steel and glass, as well as ceramic.

Calcite has a hardness of less than 5 and crystal has a hardness of 7 or greater.

Your stone is crystal!

Looks like a piece of calcite.

Limestone, referred to as limestone, is a carbonate rock with calcite as the main component. Sometimes it contains dolomite, clay minerals and detrital minerals, gray, gray-white, gray-black, yellow, light red, brown-red and other colors, the hardness is generally not large, and there is a violent chemical reaction with dilute hydrochloric acid. It belongs to sedimentary rocks according to its genetic classification.

Mineral particles and crystal structures are rare, and the surface is smooth and small granular. The hardness varies, and some dense limestone can be polished.

This is not a stone. This seems to be a brick. Yes, that's right, it's a brick.

Hello, your stone is very similar to the Gobi stone, the Gobi stone in Xinjiang is the stone in the desert, belonging to the quartz stone, there are also agate stones, sometimes it is called desert paint, sometimes it is called Fengling stone, it may be called because of the different places or the shape of the formation is different. Actually, they are all about the same stones.

This kind of stone can be played with, can be made into ornaments, can also be carved and so on.

Visually it is a piece of jasper rock, ** not expensive, just like it.

Jasperite, a dense and hard siliceous rock. It is mainly composed of chalcedony and self-generated quartz, with iron oxide and organic matter mixed, so it is often red, brown, green, rose, etc., because it is the first position of iron oxide color, so it will never change color in the oxidation environment in the air. Much more stable than bloodstone.

In addition, it is mainly siliceous minerals, which are hard, not easy to weather, not easy to wear, and not afraid of acid and alkali erosion.

River pebbles made of limestone, which are of little value, are sold by the ton.

River pebbles are a kind of pure natural stone, they are full of waves and water rushing movements, by the gravel collision friction lost irregular edges and corners, the main chemical composition of river pebbles is silica, followed by a small amount of iron oxide and trace amounts of manganese, copper, aluminum, magnesium and other elements and compounds. They themselves have different pigments, showing black, white, yellow, red, dark green, blue gray and other colors.

The reason for its formation is that the edges and corners of the broken rock blocks disappear after long-distance transportation, forming garden-shaped or oval-shaped stones, which are produced in various rivers.

River pebbles near the Haihe River are the majority, widely distributed, relatively common, and beautiful in appearance, so they become an ideal choice for courtyards, roads, and building construction stones.

Yes The construction site uses a lot of river pebbles to make concrete. Where are you and how many truckloads can you deliver?

Pebbles on the river beach, nothing of particular value. Basically, it's not very useful, and no one wants it.

Value is given by people, and if you feel good to you, it is valuable, or maybe you need it, and the same is true for others. Stones are either recognized as gems or ores or strange stones that are valuable.

It can be used by people with cervical spondylosis.

There is no shape, no painting, no flesh. Don't pick it up, it's not heavy!