feicuijade
Matrose
Joined: 27 October 2018
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Posts: 3
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| Posted: 27 October 2018 at 09:02 | IP Logged
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Confucian stone is characterized by its unique peacock green and
concentric ring structure. It is the most typical macroscopic
identification feature of hydrochloric acid foaming.The
point measurement method can measure the refractive index between
1.655~1.909, and the density can be measured by the density balance to
be 3.95g/cm2. The malachite has a small hardness and can be scored by a
knife or glass. The
difference between malachite and other green gemstones (such as
chrysocolla, green agate, green chalcedony, turquoise,
Burmese jade.arseno-aluminum-copper ore, water-phosphorite) is mainly due to the
composition of matter, internal structure, physical and chemical
properties. Differences in craftsmanship characteristics and texture. In
fact, malachite has a unique emerald green, curved concentric strips or
"layering", radial fiber structure and fiber extending perpendicular to
the color band, lower hardness and higher density, chemistry from
hydrochloric acid It is easy to distinguish it from other similar gemstones because of its characteristics or nature. In
terms of color, the standard malachite is peacock green, while the
standard turquoise is sky blue, which is easy to distinguish. Even if some turquoise is blue-green or malachite is ordinary green, careful observation can identify it. Moreover, malachite often has patterns, especially concentric rings, while turquoise does not. Turquoise
can produce a yellow reaction due to the phosphorus-containing ammonium
citrate, and it is impossible for malachite to react with the acid
tube. As
for the malachite and the green agate having the concentric annular
strip pattern, they can be easily distinguished by the difference in
hardness and density between the two. In
addition, malachite can produce chemical reactions in the presence of
hydrochloric acid, while green horse leakage, green chalcedony, and
chrysocolla can not. In
addition, the hardness of the green chalcedony is the same as that of
Marie, and higher than that of malachite, so it is easy to distinguish
malachite from green chalcedony. Malachite and chrysocolla can also be identified by their difference in density. Synthetic
malachite was first successfully produced in Russia in 1982. So far,
great progress has been made. The obtained pores and natural pores are
very similar, chemical composition, color, density, hardness, optical
properties and X-ray spectrum. Lines and other aspects are basically the same, it is difficult to distinguish. natural jade Differential
thermal analysis is the only effective method to distinguish between
natural malachite and synthetic malachite. However, this method is
damaging and is not conducive to use in the identification of finished
products.
Edited by feicuijade on 27 October 2018 at 09:05
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Topic: Burmese jade Floating green natural jade
