Identification of blood color
Colors can be divided into bright red, bright red and dark red. Bright red is the top grade, followed by bright red and dark red is the worst.
Blood morphology Its blood morphology can be divided into clot blood, striped blood and cloud blood. Two or more blood types are naturally combined, and it is necessary to determine which blood type is dominant.
Blood volume refers to the percentage of chicken blood and finished stone. More than 30% are high-grade products, more than 50% are treasures, and more than 70% are fine products. But if the blood color is not beautiful or the texture is not good, its grade will still drop sharply.
Concentration refers to the concentration of chicken blood, which is divided into three levels: thick, clear and scattered. Thick blood is the most expensive, scattered blood is diluted like chicken blood, which affects the grade.
Texture recognition
Texture refers to the stone quality of bloodstone itself, and its quality is evaluated according to four characteristics: color, transparency, gloss and hardness.
Generally speaking, the color of stone is monochrome or multicolor. In any case, thin and pure colors are the best, and their pleasing colors are the best.
Transparency is divided into three grades: translucent, slightly transparent and opaque.
Glossy waxy luster is the representative luster of bloodstone, and its own luster intensity is one of the important criteria for distinguishing the quality of texture.
The hardness of top-grade frozen stone is generally about 2 degrees on Mohs hardness, and 2 to 3 degrees is the best.
Identification of defects
Defects mainly refer to impurities and cracks in bloodstone wool and finished products, which will directly affect the beauty and value of bloodstone.
Impurities can be divided into hard impurities and soft impurities. Hard impurities include timely particles (commonly known as "stone nails"), pyrite and volcanic rocks. Soft impurities include frozen stone veinlets and volcanic rocks.
Cracks can be divided into syngenetic type and epigenetic type. Syngenetic cracks often contain fillers such as dickite and pyrite, which have aesthetic influence on the pattern and image of bloodstone, but sometimes they are more popular with collectors in terms of overall taste and value. Epigenetic cracks are caused by crustal movement or mining blasting, which has a great influence on the grade of bloodstone.
Other references:
Grade and Identification of a Bloodstone
The quality of chicken blood stone, whether the color of chicken blood looks red at first glance, the degree of transparency and the number of defects are the most basic and important identification methods.
(1) Identification of blood color:
1, color: Chicken blood color can be divided into bright red, bright red and dark red. Bright red is the top grade, followed by bright red and dark red is the worst.
2, blood shape: chicken blood blood shape can be divided into blood, blood, cloud blood, blood. Sometimes more than two blood types are naturally combined. At this time, it depends on which blood type is the main one, and its blood type is determined. If the blood shape is unique, it will often double its value because of its uniqueness.
3. Blood volume: refers to the percentage of chicken blood and finished stone. More than 30% are high-grade products, more than 50% are treasures, and more than 70% are fine products. But if the blood color is not beautiful or the base material is not good, its grade will still drop sharply. As for Yin Shi, in addition to the number of blood sold, it is also divided into six kinds of blood from six sides to one side according to the blood-containing surface. Six sides are top grade, four or five sides are authentic, three sides and two sides are medium grade, and one side is the worst. This is one of the important considerations for seal identification.
4. Concentration: refers to the aggregation and dispersion degree of chicken blood, which is divided into three levels: thick blood, clear blood and scattered blood. Thick blood is the most expensive, scattered blood is diluted like chicken blood, which affects the grade.
(2) Texture recognition:
Texture refers to the stone quality of bloodstone itself, and its quality is evaluated according to four characteristics: color, transparency, gloss and hardness.
1. color: generally, the color of stone is monochrome or multicolor * * *. In any case, the delicate and pure color is the best, and its pleasing color is the best.
2. Transparency: it is divided into three grades: translucent, slightly transparent and opaque.
3. Gloss: Waxy luster is the representative luster of bloodstone, and its own luster strength is one of the important criteria for distinguishing the quality of texture.
4. Hardness: The hardness of top-grade frozen stone is usually about 2 degrees on Mohs hardness, and 2-3 degrees is the best.
(3) Identification of defects:
Defects mainly refer to impurities and cracks in bloodstone wool and finished products, and their existence will directly affect the beauty and value of bloodstone.
Impurities: can be divided into hard impurities and soft impurities.
1. Hard impurities: including timely grains (pea-shaped protrusions in the texture, commonly known as "stone nails") and pyrite (cloud-shaped, disseminated, produced in chicken blood and texture or distributed along micro-cracks); Volcanic rocks (one is a breccia-like disk, the other is irregular, with soft and hard color and texture).
2. Soft impurities: including frozen stone veinlets and volcanic rocks.
3. Fracture: It can be divided into syngenetic type and epigenetic type. There are often fillers such as dickite and pyrite in contemporaneous cracks, which have this influence on the pattern and image of bloodstone in aesthetics, but sometimes it is loved by collectors in terms of overall taste and value. Epigenetic cracks are caused by crustal movement or mining blasting, which has a great influence on the grade of bloodstone.
(4) Identification of fakes: Because bloodstone is expensive, many counterfeiters make fakes to reap huge profits, so identification of fakes is particularly important.
Identification of fake goods: it can be divided into three ways: chicken blood, texture and weight.
1, fake chicken blood: no silver spots, uneven chromaticity, uneven line thickness, unnatural patterns, and the arrangement does not conform to the occurrence law of chicken blood, which is easy to distinguish with the naked eye.
2, texture: fake with plastic compounds, no stone feeling at all, and no stone chips when carved with a knife. Some people even sliced the bloodstone, then stuck it on the original stone, and then glued it with caulking glue and stone powder, which looks very similar to the real bloodstone. If you look closely under strong light, you can tell the truth from the false, or it is not difficult to see through whether the color of blood is consistent with the shape of the painting. Moreover, some people use stone powder and compounds to paint "cinnabar" or red watercolor on plastic molds to fake chicken blood.
3. Weight: The weight of real bloodstone is relatively stable, while the weight of fake bloodstone is relatively frivolous. As long as the following steps are carefully tested: (1) fine grinding with emery cloth, true bloodstone will appear as vermilion powder, while fossils will not; (2) Carved with a knife, the fake bloodstone appears as plastic curly stone chips after cutting, which can be felt; (3) With fire, the fake bloodstone will have a burnt smell, but the real bloodstone will not; (4) The quality is heavier by hand, and the fake bloodstone feels lighter due to different textures; (5) Sticking meat to test the stone feeling, the fake bloodstone has no cold feeling of stone.
1, Identification between bahrain bloodstone and Changhua bloodstone: 1, Identification of blood color: Changhua bloodstone is bright red with directional and regular distribution, while bahrain bloodstone is dark red or immature red with cotton wool distribution; (2) Texture: Changhua bloodstone mineral assemblage is complex and tough, often containing a small amount of impurities, while bahrain bloodstone mineral assemblage is single, tender and easy to crack.
(5) Classification: Mainly based on color, texture and defect, color comes first.
High-grade goods
Brilliant and profound
Various shapes
30%—50%
There are all kinds of frozen soil and pure soft soil.
Occasionally crack impurities.
The blood distribution is balanced and there is coagulation.
Mid-range products
Thick and light
Various shapes
10%—30%
Soft soil or soft frozen soil appears alternately.
There are some impurities in the crack.
Happy and bright
sundry goods
Light and darkness
Various shapes
Less than 10%
Mixed soft soil foundation
Ming and Qing works have historical and cultural value, and their grade standards are often at or above the level of treasures, so their preciousness and importance are self-evident. Super-high-grade treasures, regardless of the year of production, are extremely high in color and texture, or their quality and materials are unique rare treasures.
Bloodstone should be avoided being placed in the sun or under the lamp for a long time, so as not to reduce the value of chicken blood because the red part darkens. Usually, it should be rubbed or soaked in good lubricating oil, such as jade, to isolate the stone from the air, reduce the possibility of temperature difference cracking and increase the warmth of the stone. In addition, collision and breakage can be avoided.
Proper playing and rubbing of bloodstone can make it look "old light", which is also commonly known as "treasure light" and become "old stone" more pleasing to the eye. The reason is exactly the same as that in Pan Yu. However, Yin Shi or sculptures engraved with thin ideas should be avoided, so as not to destroy the sculptor and make him unrecognizable.
For the uncut Yin Shi, or the original stone, you may wish to rub it more; The uncut Yin Shi has the advantage of not being damaged easily. Playing with stones and raising stones is fun, and it is difficult to enter its territory without personal experience!
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C bloodstone is produced in Changhua, Lin 'an and other counties in Zhejiang. The stone with blood is called bloodstone, and the stone without blood is called Chang fossil.
To evaluate bloodstone, we should first look at the red color of "blood", which has good freshness, coagulation and thickness. Fresh people are as red as blood; Coagulant aggregates but does not disperse; Thickness refers to the thickness and number of layers, which go deep into the stone layer. In addition, the spread of bloodstone is also an important basis for judging bloodstone. What kind of stone is the ground red? The ground of bloodstone is pure, translucent, and the bright red without nails is the top grade. The samples of bloodstone can be divided into square, rectangle, ellipse, circle and deformity, and the size is about 5-2 cm.
Bloodstone is delicate, tough and compact in structure, and will not collapse when cutting.
A good bloodstone is not carved, so it's better to make a seal. It can be said that cut chicken blood is generally used to cover up its defects, which is not expensive.
Due to the high quality and price of bloodstone, there are many counterfeiters. The fake method of bloodstone is generally as follows:
Mosaic method Take a good Chang fossil seal, select several eye-catching places, dig out small pits with different depths respectively, then inlay it with red flowing mercury paint, dry it in the shade naturally, and then polish and wax it. However, this kind of embedded chicken blood (mercury sulfide) has no hierarchy, and the joint between blood and fossils is hard and there is no transition.
(2) Immersion method. Take a square fossil, coat it with mercury sulfide where necessary, then dry it in the shade, then dry it in the shade to make its blood slightly layered, then soak it in transparent resin to ensure that it is soaked to the skin, pick it up and dry it, and then polish it with fine water and fine sand. The fake bloodstone made by this method, because the resin is easy to age, the skin will turn yellow over time, which is out of harmony with the color of the stone inside; At the same time, the pores of the resin epidermis are relatively thick. Careful observation with a magnifying glass shows that there are a little tiny scratches on its surface.
(3) Slice and skin sticking method. Cut the six planes of the lithograph into six planes as thin as paper with a cutting machine. Apply mercury sulfide where necessary. After drying, glue the original six pieces back with blanching and glue, and then smooth the corner between the pieces and glue. In this way, the red color of chicken blood seems to be born in the stone chapter and distributed naturally. But the blood level can only stay on one plane after all. This Zhong Shiyin can only be confined to square or rectangular lithographs, and nothing else will do. Because the circular deformed lithograph can't be cut and carved, the trace of thermal adhesion of the sheet is exposed.
(4) Supplementary method. This is made by adding mercury sulfide to true bloodstone, covering the added part with a very thin layer of resin and polishing. This method is to replenish blood with blood, which is undoubtedly icing on the cake and greatly increases its value. At the same time, there are fallacies in truth and fallacies in truth. Therefore, for the particularly good bloodstone, we must pay attention to the method of thinking of counterfeiters in parallel during observation, so as to avoid the consequences of "inadvertently losing Jingzhou".
In the 1970s, bloodstone was also found in Chifeng, Inner Mongolia. However, it is not as delicate and tough as Changhua bloodstone, with high water content and easy to crack in case of drought. The blood distribution is mostly in the shape of blood tendon, criss-crossing, scattered but not aggregated, and easy to oxidize and turn black. Inner Mongolia bloodstone and Changhua bloodstone are the same variety, but their values are far from each other.