In the jewelry market, quartz jade is a very common jade variety, not only in quantity, but also full of various commercial names. So many names of quartzite jade, can you get it? Let me lead you today to understand the big family of quartz jade.
What is quartz jade?
The constituent minerals of quartz jade are mainly cryptocrystalline-crystal crystallization quartz, and there may be a small amount of mica, chlorite, clay minerals, limonite and other impurities. The chemical composition is mainly SiO2 and contains various impurity elements. Quartz jade is colorless when pure. It can be used in different colors when it contains different impurity elements such as iron, nickel, etc., or mixed with different colored minerals. Due to the degree of crystallization and the impurities contained in the quartz jade, the density will vary to some extent, generally around 2.60 (±0.1) g/cm3; the hardness is 6.5-7, slightly smaller than quartz.
Here are some of the types of quartz jade that are common in the market:
1, chalcedony
Chalcedony is a kind of cryptocrystalline quartzite, including green chalcedony, blue chalcedony, Huanglong jade, Taishan jade, gold jade and so on.
Green chalcedony: also known as Oja, a kind of green chalcedony with iron, chrome, nickel and other elements, green, often with yellow and gray tones, uniform color, micro-transparent - translucent, high quality Bright apple green.
Blue Chalcedony: commonly known as "Taiwan Sapphire", the color is blue to blue-green, the color is uniform, Cu2+ coloration, flawless, opaque - micro-transparent.
Huang Longyu: Produced in Longling County, Baoshan, western Yunnan Province, named Huanglongyu. Yellow-brown red, uniform color or strip distribution, oily luster, metal minerals such as iron, manganese, aluminum and other trace elements, translucent-opaque.
Taishan Jade: Produced in Naqin Village, Taishan City, Guangdong Province, it is a kind of cryptocrystalline jade, mostly yellow or orange-red. In addition to containing quartz, it also contains minerals such as iron ore, chlorite, muscovite and sericite. .
Jinsiyu: Because it is produced on the ancient Silk Road, the jade is golden yellow, and the interior is named after the radish pattern. There are many commercial names for Jinsiyu, such as “Yihe Caiyuâ€, “Kelama Yiyuâ€, “Jianmueryuâ€, “Loulanyu†and “Xinjiang Jinsiyuâ€.
2, agate
Agate is also a code base, agate, horse brain, etc. It is a cryptocrystalline quartz stone with streaky or kidney-like structure, including South Red Agate, Warring States Red Agate, Alashan Agate, and Moss Agate.
South Red Agate: As early as 3,000 years ago, the South Red Agate was once made into a daily currency by the ancient Jinsha country for daily life. The South Red Agate is named for its origin, and the red color is caused by tiny iron oxide spots. The main producing areas are Baoshan in Yunnan, Liangshan in Sichuan and Diebu in Gansu.
Warring States Red Agate: Named after some of the agate ornaments in the relics of the Warring States Period, it was mainly produced in Beipiao City, Liaoning Province and Xuanhua County, Zhangjiakou City, Hebei Province. The color is mainly red and yellow, and occasionally black, white and so on.
Alashan Agate: Produced from the Inner Mongolia Alashan in the hinterland of northern Xinjiang, the surface is mostly round and round, sometimes there are pits after wind erosion, red, yellow, green and purple. Xinjiang, China, also produces similar varieties, which are known as “raisin agate†on the market.
Moss agate: A moss-like, dendritic-like agate containing impurities. The general green moss pattern is formed by the fine scales of chlorite. The black branches are made up of iron and manganese oxides.
3, Bi Shi
Bishi: It is a kind of chalcedony containing more iron oxide and clay minerals. It is opaque and has a dark red, green or mottled color. The jewellery industry often names jasper by color, such as green jasper and red jasper. The more expensive varieties are landscape jasper and blood drop stone.
4, Dongling Stone
Dongling Stone: It is a quartzite with a gold effect. The color is related to the impurity minerals contained. The chrome-containing mica is green, called the green dongling stone; the blue-lined stone is blue, called the blue dongling stone; the lithium-containing mica is purple, called the purple dongling stone.
5, dense jade
Miyu: Produced from Niutiantou, Mixian County, Henan Province, China, mainly composed of quartz, containing a small amount of sericite, zircon, tourmaline, rutile, apatite, mud and so on. There are five colors, such as green, white, red, green and black. The green color is made by fine sericite, commonly known as “Henan Cuiâ€.
6, Yu Tai Cui
ä½˜å¤ªç¿ : It is a kind of green quartzite containing muscovite and sericite. It is named after it is produced near the town of Wutai, Wulat Qianqi, Inner Mongolia.
7, Jingbaiyu
Jingbaiyu: Named after the discovery of the Xishan area in Beijing in the 1960s, it is a relatively pure quartzite, usually pure white, sometimes with a bluish, slightly green or gray hue, no impurities, and the quartz content is above 95%. The particles are fine, fine in texture and slightly transparent. Good quality, polished white as a sheep fat jade, but not as good as the fat jade, and the crispness of the sheep fat jade.
8, Guicui
Guicui: Produced in Jinglong County, Guizhou Province, it is also known as “Guizhou Jade†and “Qinglong Jadeâ€, a fine-grained quartzite containing blue-green kaolinite, mainly in light blue-gray Green, also see green, there are also gray yellow and red varieties. There are many sandstones in Guicui, including soft minerals such as fluorite, calcite and cloud cream.
9, kava stone
Kava Stone: Kawa means "stupid" in Uighur, and is used to counterfeit Hetian jade. White kava stone, may be quartzite, marble, serpentine jade; black kava stone may be black serpentine jade, black volcanic rock, black siliceous rock, etc.; yellow kava stone may be yellow quartzite , marble, dolomite, serpentine jade and so on.
Introduced so many quartzite jade varieties, there are many trade names, in order to standardize the name of quartz jade, in 2017 the National Standards Committee and the General Administration of Quality Supervision, Inspection and Quarantine jointly issued GB/T34098-2017 "quartz jade classification and naming "National standard. The standard was officially implemented on February 1, 2018.
The national standard "quartz jade classification and naming" divides quartz jade into three major categories (crystal quartz jade, cryptocrystalline quartz jade, quartz jade with silica illusion), and 7 varieties. (Quartzite jade, chalcedony, agate, bismuth, wood, stone, silicified wood, siliconized coral), the definition of the basic name of quartz jade and the name of quartz jade trade name, and the main varieties of seven varieties of quartz jade Characteristics, as well as the rules and representations of quartz jade, and a list of quartz jade basic names and trade names. The standard stipulates that in the quartz jade identification certificate, the name of quartz jade can be named separately by “basic name†or jointly by “basic name†and “trade nameâ€; the basic name should be clearly indicated in a prominent position. The trade name should not be used alone, and the trade name: ××× can be indicated in the note.
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