How can you tell if it s agate or glass?

Methods of identification of agate:

1.From the process aspect:

As a precious jade, agate is produced in an extremely strict process; The surface is required to be smooth and round, no scratches, no cracks, and the circumference of the grain inlay is firm. High-quality agate is never wasted, if you come across agate with "scars", it is mostly a stone imitation fake; Natural agate is hard and has few blemishes; Scratching on the agate with jade, the fake agate is easy to leave scratches, but the real agate is not.

2.Judging by the color:

The color of agate is red, blue, purple and pink; However, most of the blue and purple agate colors are artificially processed and dyed, which is presented as a natural variegated color, which is not easy to be directly processed into jewelry, and can only be used for a few years, and then it will fade. Natural colors of agate are often red, amber, and white, all of which are common colors in nature.

3.In terms of weight:

The weight of the premium agate block is more than kilograms, the weight of the first-grade agate block is more than kilogram, and the weight of the second-grade agate block is more than kilograms. Good agate is complete and transparent, moist and bright, implying a halo, among which the water urchin agate with a closed water hole is the most precious.

4.Zoom in to observe:

with a magnifying glass. Observe the inside of the agate, if it is a glass imitation, there will generally be small bubbles inside; The patterns of bubbles are mostly bead-shaped, oval-shaped, etc. The inside of natural agate is free of bubbles and has concentric ribbon lines.

5.Start with the temperature:

The density and hardness of agate are much higher than that of glass, and the temperature itself is relatively low, but the heat conduction is relatively fast; Glass is not a crystalline substance, and it conducts heat more slowly. The agate feels very cold in the hand, while the glass feels warmer.

How to identify real and fake agate jewelry.

Agate is a gemstone commonly used in jewelry inlays and carving crafts. The method of distinguishing between true and false is as follows:

1) Color: The color of real agate is bright and bright, and the color and light of false agate are poor, and the contrast between the two is more obvious. The natural red agate is distinctly colored, and the bands are very distinct, and if you look closely, you can see the dense array of fine red spots in the red bands.

The fake agate chimney bottle imitated by stone, most of which are petal-shaped patterns at the bottom, forming a "chrysanthemum bottom"; The dyed blue agate is bright and uniform in color, giving people a false feeling.

2) Texture: Fake agate is mostly imitated by stone, which is softer than real agate, and traces can be drawn on the fake agate with jade, while the real product can not be drawn. On the surface, real agate has few flaws and more inferior quality.

3) Process quality: The production process of high-quality high agate is strict and advanced, so the surface brightness is good, the inlay is firm and circumferential, and there are no scratches and cracks.

4) Grade: Water urchin agate is the most precious variety of agate, characterized by closed cavities in agate containing water.

Take a beam of light through the agate to irradiate, you will find that the real agate will be as turbid as fog, of course, this is only some of the simplest methods, some agate fraud is so high that it is difficult for non-professionals to identify There is also a (1) (2) on the first floor to refer to

1. Temperature: real agate is warm in winter and cool in summer, while glass agate changes with temperature, it becomes hot when it is hot, and it becomes cool when it is cold.

2. Color: The color of real agate is bright and bright, and the color and light of glass agate are poor, and the contrast between the two is more obvious. For example, the natural red agate is distinctly colored, the bands are very obvious, and if you look closely, you can see dense red spots at the red bands; With glass agate, the color of dyed blue agate is bright and uniform, giving people a false feeling.

3. Concentric laminar structure:

The most significant difference between real agate and glass agate is whether there is a concentric laminar structure in the cross section.

4. From glossiness:

Generally speaking, real agate feels cool to the touch, and the surface seems to be coated with a layer of wax, and has a waxy luster; Whereas, glass agate has no gloss.

5. Heating state:

True agate because it is a crystalline body formed in a melting state, mostly spherical such as rain stone, particularly dense, the surface is more delicate after grinding, and can be rubbed more than a dozen times on the hard miscellaneous wooden board, so it is not hot, but the wooden board is hot; Whereas, on the contrary, glass agate is hot while the template is not.

Glass and agate can be distinguished from the structure, feel, and color, and the internal structure of the agate is generally very uniform and looks very hierarchical, while bubbles or spirals may appear inside the glass. Put the agate and the glass in your hand, the agate feels colder to the touch, and the glass gets hot quickly. Natural agate is rich in color and looks more natural than glass color.

1. When comparing structural glass and agate, you can look at the internal structure of the two, generally naturally formed agate, the internal structure is very uniform, it looks very layered, and there are almost no impurities. The internal structure of the glass is not as homogeneous as agate, and bubbles, or spirals, may be created during the stirring process.

2. The feel of the glass and the agate are also different, put the two in the hand, the orange hidden glass will soon become as hot as the human body temperature, but the agate gives people a cold touch. At the same time, agate shows grease luster, Yuannian and glass show glass luster, and the gloss of glass is not as good as agate.

3. The color of natural agate is rich in color, some agate will also present several colors, which looks very full and bright, the color of the glass is not naturally formed, but artificially made, usually the color of the glass does not look like agate carries nature, and even looks a little fake.

1. The ingredients are different.

Agate: The main ingredient is silica, which is often repeated in layers due to alternation with hydrated silica (silicic acid). Due to its oxide metal inclusions, the color can range from very light to dark.

Salts such as iron, cobalt, and nickel can be artificially made by allowing them to naturally penetrate into the silicic acid gel"Agate"Natural agate may have been produced under similar circumstances.

Glass: Its main components are silica and other oxides. The chemical composition of ordinary glass is Na2SiO3, Casio3, SiO2 or Na2O·CaO·6SiO2, etc., and the main component is silicate double salt, which is an amorphous solid with irregular structure.

2. Different uses.

Agate: often used as a plaything, ornamental, ornament or reward. There are many kinds, known as "thousands of agate and ten thousand kinds of jade", in addition to the most precious agate of water urchin agate, it is generally good to match the harmonious color raw materials.

Glass: Widely used in buildings, used to insulate wind and light, is a mixture. In addition, there are colored glasses that are mixed with oxides or salts of certain metals to show color, and tempered glass that is prepared by physical or chemical methods.

3. Different maintenance methods.

Agate: Do not collide with hard objects or drop, and store it in a soft jewelry box when not in use. Try to avoid contact with perfumes, chemicals, soaps or human sweat.

Agate is usually placed as far away from the sun as possible, wipe it frequently to keep it clean, and if possible, occasionally soak it in pure water to replenish moisture, and keep humidity Agate will be more beautiful.

Glass: Do not hit the glass surface hard, in order to prevent scratches on the glass surface, it is best to lay a tablecloth. It is necessary to avoid moisture, keep away from the stove, and isolate it from chemical reagents such as acid and alkali to prevent corrosion and deterioration.

The use of plastic wrap and a damp cloth sprayed with detergent can also give a "new life" to the glass that is often stained with oil.

The difference between glass ridge slip glass and agate is the material and appearance.

Glass is an inorganic amorphous material whose main component is silicon dioxide. It is transparent, hard, and easy to process, and is often used to make windows, containers, and decorations. Agate is a feast of gemstones, the main ingredient is microcrystalline silica cherry blossom wax.

It usually exhibits a wide variety of colors and textures, with a high degree of gloss and hardness. Agate is often used in jewelry and handicrafts. Materially, glass is inorganic and amorphous, while agate is a gemstone.

In appearance, glass is usually transparent or translucent, while agate has a unique color and texture.

1. Agate: cryptocrystalline quartz jade with band-like structure.

2. Natural glass: "glass" formed under natural conditions.

3. The difference between agate and glass:

Imitations of quartz jade are mainly glass. These glasses are completely vitreous or semi-vitrified. It can be colored red, green, etc., and some can also have a ring ribbon structure.

Compared with quartz jade such as agate, these glass imitations have a lower density and refractive index, can contain bubbles, and are often completely matted or abnormally matted under orthogonal polarizers. The specific differentiation method is as follows:

1) Mineral composition:

Agate: cryptocrystalline quartz, with a small amount of mica minerals, chlorite, limonite, hematite, goethite, clay minerals, etc.

Natural glass: glass meteorite, volcanic glass (obsidian, basalt).

2) Color. Agate: white, red, green, black, etc.

Natural glass: glass meteorites are medium to dark yellow, gray-green; Volcanic glass is black (often with white markings), brown to brownish yellow, orange, red, green, blue, purple-red rare; Obsidian often has white patches, sometimes chrysanthemum-like.

3) Gloss and transparency

Agate: The polished plane can be glassy, greasy or silky, and the fracture is generally grease. Micro-transparent – transparent.

Natural glass: Vitreous luster, transparent to opaque.

4) Refractive index:

Agate: , the point measurement method is often or, and it can be measured individually.

Natural glass: , birefringence index none.

5) Hardness: Agate: Mohs hardness.

Natural glass: Mohs hardness 5 6.

6) Density: Agate: g cm3.

Natural glass: glass meteorites are, ; Volcanic glass for, .

7) Phototic characteristics:

Agate: heterogeneous aggregate with no extinction position under orthogonal polarizer.

Natural glass: homogeneous body, common abnormal extinction.

8) Pleochroism:

Agate: No pleochroism in aggregates.

Natural glass: None.

9) Absorption Spectroscopy:

Agate: generally there is no characteristic spectrum, only a few varieties can produce characteristic absorption spectrum due to the presence of a small amount of chromogenic elements, such as chromium mica-containing quartzite can have 682nm, 649nm absorption band.

Natural glass: not characteristic.

The rope is carried and gently struck with a small metal rod, the sound is crisp and glassy, and the sound of agate is muffled.

Another way is to use a lighter to ignite the approach, without the need for flames. You'll know as soon as I say it.

Scratching the glass with agate will really leave a very obvious mark on the glass, and it will be obvious to feel when the fingernail is scratched.

The glass does not leave obvious marks, and even if it does, it is not easy to feel with your hands.

Agate and agate rub against each other gently, and the resistance is minimal. Glass, you know, the screeching sound.

The hardness of agate is seven, and the hardness of glass is five.