Chinese famous jade series - Dushan jade
I. Dushan jade
Various products of Towel, it is ok to use in many field, like Car Cleaning Towel and Face Cleaning Towel, Kitchen Cleaning Towel, We are a professional and qualified manufacturer of Towel, and look forward to your sincerely cooperation chance, trust me, we will give you a big suprise. Year-round online, quick response, sample offered in time.
Towel Microfiber Towel,Quick Dry Towel,Cleaning Towel,Sport Towel Danyang Flanders Textile Co., Ltd , https://www.flandersmicrofiber.com
Dushan jade is named after Dushan Village, Qiliyuan Township, Wolong District, about 8 kilometers northeast of Nanyang City, Henan Province. It is also called “Nanyangyuâ€.
Dushan jade has a long history of mining. Among the jade articles unearthed from the Yin Ruins, there are many Dushan jade products. According to the textual research on the Nanyang jade shovel unearthed from Huangshan Mountain in Nanyang County, it should belong to the Neolithic Age, about 6,000 years ago. According to the "Han Shu" records, Shagangdian Village at the foot of Dushan Mountain, called "Jade Street Temple" in the Han Dynasty, was the place where jade articles were produced and sold at that time. It has a history of more than 2,000 years.
Dushan jade has a variety of colors, complete patterns, both shades and shades, and the texture is delicate, dense and hard. It is an important jade material for carving art and crafts. It is a beautiful flower and bird, rarely processing bracelets, ornaments, pendants and other accessories. Jade has a Mohs hardness of 6-6.5, a specific gravity of 2.9, glass luster or grease luster, opaque, slightly transparent to translucent, and a small amount of quality products are close to transparent.
Second, the monoshan jade geological output
The plagioclase rock mass is mainly vein-like and has a network of veins, lenticular, agglomerate, geese, and tiling. Dushan jade is produced on the inner side of the crushing zone of the altered gabbro and obliquely-proximal peridotite. The jade vein is distributed in the direction of 330°. Dushan jade is mainly controlled by the sub-flash agglomerated medium-grained coarse-grained gabbro.
3. Dushan jade petrology classification
Dushan jade is a gabbro-basalt type in the basic rock types in the petrological classification. The mineral composition is mainly basic plagioclase (é’é•¿çŸ³ç‰Œå· An>50, La feldspar pebbles feldspar-calcium feldspar), pyroxene, a small amount of olivine, hornblende, biotite, and may have a trace amount of potassium. Stone and quartz appear.
The chemical composition of Dushan jade is a calcium aluminosilicate rock with a Si02 content of 45-52%, which is called basic rock and rich in TiO2. The general content is >1%.
The basic rocks are widely distributed in the earth's crust, accounting for 0.4% of the magmatic rock in China. Among them, the basalt is the most widely distributed (such as the Permian Emeishan basalt in the Yunnan, Guizhou and Sichuan provinces with an area of ​​500,000 square kilometers). The Changyan is dominated by vein intrusion, so the total distribution is very small.
The plagioclase is a deep-colored light-colored dyke in the basic rock. It is named after the “International Geotechnical Association (IUGS) deep diagenesis classificationâ€, which accounts for “the plagioclase 31â€, and the classification map of the ultramafic feldspar and gabbro. The middle part of the "11 plagioclase".
The chemical composition of the plagioclase (Dyley value) SiO250.40, TiO20.15, Al2O328.30, Fe2O31.06, FeO1.12, MnO0.05, MgO1.25, CaO12.46, Na2O3.67, K2O0.74 , H2O0.75, P2O50.05
Four, Dushan jade minerals
1, mineral combination
Plagioclase, diopside, ordinary pyroxene, actinolite, amphibole, epidote, chlorite, zoisite (slanted curtain stone), apatite, vermiculite, calcite, sericite, Black mica, chrome mica.
2, the main mineral detection parameters
Plagioclase
Labradorite Ab50An50-Ab30An70 triclinic NP=1.555-1.563 Nm=1.558-1.567 Ng=1.562-1.571 Ng-NP=0.007-0.008 2V(ten)=76°-90° (010)∧(001)= 84° 4′ crystal columnar, (010) plate-like, sodium bismuth twin crystal bonded to Karlsfeld twin, cleavage (001) complete, (010) good, (110) poor. (010) The mask is green and blue.
Pebble stone Ab30An70-Ab10An90 triclinic NP=1.563-1.571 Nm=1.567-1.577 Ng=1.571-1.582 Ng-NP=0.008-0.011 2V(-)=79°-83° NP∧ (010) =39° -51° Crystalline columnar, (010) plate-like, sodium-niobium twin crystal bonded to Kapfel twin.
Anorthite Ab10An90-Ab0An100 triclinic NP=1.563-1.571 Nm=1.567-1.577 Ng=1.571-1.582 Ng-NP=0.008-0.011 2V(-)=79°-83° NP∧ (010) =39° -51° Crystalline columnar, (010) plate-like, sodium-niobium twin crystal bonded to Kapfel twin.
Erythrolith monoclinic system NP=1.711-1.729 Nm=1.715-1.761 Ng=1.719-1.778 Ng-NP=0.008-0.049 2V(-)=64°-89° Fe+3 increase 2V decrease b// Nm c∧NP =1°-5°a∧Ng=25°-30° pleochroism NP=none, light yellow, orange yellow, light green Nm=light yellow, brownish green Ng=golden, lemon, green crystalline columnar, slablike, Cross section of the fake hexagon.
Oblique slanting stone monoclinic system NP=1.697-1.711 Nm=1.699-1.715 Ng=1.702-1.719 Ng-NP=0.005-0.008 2V(+)=65°-90° Fe+3 increase 2V decrease b// Nm c∧NP =0°-12° Abnormal Prussian blue interference color. Crystalline columnar, plate-like, granular, cross-section pseudo-hexagon
Oblique stone orthorhombic system NP=1.695-1.701 Nm=1.696-1.702 Ng=1.702-1.706 Ng-NP=0.006-0.009 2V(+)=30°-60° Fe+3 increase, 2V from 30°→0 °→60°, showing a shaft crystal. a //Nm b//NP c//= Ng Abnormal Prussian blue and brown interference color. The crystal form is columnar, plate-shaped, granular, and the cross-section is a pseudo-hexagon.
Ordinary pyroxene monoclinic system NP=1.682-1.700 Nm=1.687-1.706 Ng=1.710-1.724 2V(ten)=50°-61° Fe+3 increases, 2V is from 30°→0°→60°, Axial crystal. a∧NP=23°―31° b//Nm c//Ng=+38°―+55° (010) face c∧Ng=+38°-+54° polychromaticity NP=light green Nm=light yellow Green Ng = green. The crystal form is short columnar, with polycrystalline twin crystals and cross-section octagon.
