DANBURITE
The English name for Danburite comes from the discovery of Danbury, Connecticut, USA. The British Museum of Natural History in London, UK, houses a yellow stepped faceted racer from Myanmar. It weighs 138.61 ct. It is a yellow gold produced by the Smith Museum in Washington, USA, weighing 18.4ct; a grain made in Japan. Colorless race citrine, weighing 7.9ct.
Basic nature
1. Chemical composition: calcium borosilicate, CaB2[SiO4]2
2. Crystal system: orthorhombic system
3. Crystal habit: often short columnar, top wedge shape, crystal mask longitudinal pattern, can form crystal clusters, aggregates are massive or granular
4. Cleavage: bottom cleavage, not obvious
5. Fracture: half shell
6. Hardness : 7
7. Specific gravity: 3
8. Refractive index: 1.630-1.636
9. Birefringence: 0.006 (more stable)
10. Light: Biaxial crystal. The lightness depends on the wavelength of the light used for illumination, the negative light when red to green, and the positive light when blue.
11. Gloss: glass luster
12. Transparency: transparent
13. Dispersion: low (0.017)
14. Color: colorless, light yellow, brown, occasionally pink. Among them, honey yellow and wine yellow are like topaz.
15. Absorption spectrum: Blue and green apatite shows a mixed absorption spectrum of rare earth elements.
16. Luminescence: It can emit blue fluorescence under long and short wave ultraviolet light.
17. Identification points: Refractive index, low birefringence, biaxial gems and relative density are the key criteria.
18. Density: 3.00g/cm3
other information
Introduction
Sai Huang Jing is called Sai Jing, because its composition is very similar to Huang Jing, but after all, it is slightly different, so the Chinese translation has
become Sai Wong.
And the difference is that there is a difference. The most important thing is that the gem-quality Sai Wong is reputed to be a substitute for diamonds in the collection, which is also because the gem-quality Sai Wong is very rare. Danburite Jing has transparent, pink, yellow, and lavender (some Danburite will have stripes). In fact, most of the game citrine is gray opaque, which is quite common. The gem-quality transparent color game topaz ore will be very small, and the ore itself is very very small, so the gem-grade DANBURITE crystal can only be made into finished products such as ring face and pendant.
Therefore, for the fans of Sai Huang Jing, Sai Huang Jing is largely a collection rather than a jewelry. Keeping it in its original shape is also a kind of obsession with many collectors.
Gemological data
Generally made into faceted gemstones, rarely used directly as jewelry, and used for collection.
Occurrence and origin
Danburite is produced from metamorphic limestone and low-temperature hydrothermal fluid. It is symbiotic with micro-inclined feldspar and feldspar in dolomite. Alluvial sand mining is an important source of Danburite The gem-quality yellow crystals come from Madagascar; the yellow and colorless crystals are produced in the Mugu area of Myanmar; the colorless and pink crystals are produced in Mexico; and the colorless crystals are produced in Japan.
Primary identification feature
DANBURITE crystals look like topaz, but the bottom cleavage is not as obvious as topaz. The finished product can be distinguished by testing the refractive index, birefringence, and relative density.
Basic nature
1. Chemical composition: calcium borosilicate, CaB2[SiO4]2
2. Crystal system: orthorhombic system
3. Crystal habit: often short columnar, top wedge shape, crystal mask longitudinal pattern, can form crystal clusters, aggregates are massive or granular
4. Cleavage: bottom cleavage, not obvious
5. Fracture: half shell
6. Hardness : 7
7. Specific gravity: 3
8. Refractive index: 1.630-1.636
9. Birefringence: 0.006 (more stable)
10. Light: Biaxial crystal. The lightness depends on the wavelength of the light used for illumination, the negative light when red to green, and the positive light when blue.
11. Gloss: glass luster
12. Transparency: transparent
13. Dispersion: low (0.017)
14. Color: colorless, light yellow, brown, occasionally pink. Among them, honey yellow and wine yellow are like topaz.
15. Absorption spectrum: Blue and green apatite shows a mixed absorption spectrum of rare earth elements.
16. Luminescence: It can emit blue fluorescence under long and short wave ultraviolet light.
17. Identification points: Refractive index, low birefringence, biaxial gems and relative density are the key criteria.
18. Density: 3.00g/cm3
other information
Introduction
Sai Huang Jing is called Sai Jing, because its composition is very similar to Huang Jing, but after all, it is slightly different, so the Chinese translation has
become Sai Wong.
And the difference is that there is a difference. The most important thing is that the gem-quality Sai Wong is reputed to be a substitute for diamonds in the collection, which is also because the gem-quality Sai Wong is very rare. Danburite Jing has transparent, pink, yellow, and lavender (some Danburite will have stripes). In fact, most of the game citrine is gray opaque, which is quite common. The gem-quality transparent color game topaz ore will be very small, and the ore itself is very very small, so the gem-grade DANBURITE crystal can only be made into finished products such as ring face and pendant.
Therefore, for the fans of Sai Huang Jing, Sai Huang Jing is largely a collection rather than a jewelry. Keeping it in its original shape is also a kind of obsession with many collectors.
Gemological data
Generally made into faceted gemstones, rarely used directly as jewelry, and used for collection.
Occurrence and origin
Danburite is produced from metamorphic limestone and low-temperature hydrothermal fluid. It is symbiotic with micro-inclined feldspar and feldspar in dolomite. Alluvial sand mining is an important source of Danburite The gem-quality yellow crystals come from Madagascar; the yellow and colorless crystals are produced in the Mugu area of Myanmar; the colorless and pink crystals are produced in Mexico; and the colorless crystals are produced in Japan.
Primary identification feature
DANBURITE crystals look like topaz, but the bottom cleavage is not as obvious as topaz. The finished product can be distinguished by testing the refractive index, birefringence, and relative density.