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Now, if the amount of pyrite is high, azure can be seen as a green or matte background. In Lapis lazuli from Chile (north of Santiago) and Russia, they have a lower value due to the presence of prominent streaks and white spots of calcite.
Synthetic Azure Stones
In the field of production of synthetic azure stone, although many jewelers do not consider it a fundamental center. In 1954, artificial glassware such as Spinel was dyed with cobalt oxide and sold as lapis lazuli, which is easy to detect because it does not contain any inclusions or substances such as pyrite.
Stones that you may confuse with natural azure!
Azure stone can be used with stones such as lazurite, sodalite, azurite, blue jasper, or be mistaken for dumortierite. Nowadays, stones often dye low-quality azure, which depending on the quality of the resin used and its processing method, this stone may fade or remain unchanged over time.
For example, dolomitic Marble (Jade Mountain or Jasper or Howlite painted with blue resin and polished with oil. On the other hand, some eat the azure and squeeze it together with plastic.
In German Neukrish, the jade-brown gray powder is melted in a blue process and marketed as Swiss lapis lazuli. Others use pyrite to beautify this stone.
Also, sometimes there are different names of this stone in the market, for example:
- Swiss Lapis (Painted jasper or chalcedony)
- German Lapis (Painted jasper)
- Canadian Lapis (The same as sodalite)
so you should not confuse them with lapis lazuli gemstone.
According to the ancient Roman historian Pliny, in ancient times the name “Lapis Lazuli ” was known as “sapphire” or sapphire. Lapis Lazuli is a semi-precious stone with a bluish-blue color with a hardness of 5 – 5. Lapis lazuli is seen as opaque and its luster is glassy to waxy. The crystalline system of lapis lazuli cubic and dodecahedron in variable sizes in the form of veins, often found in the bed a few centimeters, among marble or irregular veins in limestone. In Lapis Lazuli, Chile (north of Santiago) and Russia, they have a lower value due to the presence of prominent streaks and white spots of calcite. Gilson Lapis Lazuli’s specimen is very similar to its natural counterpart. In 1954, artificial glass ores such as spinel were painted with cobalt oxide and sold as lapis lazuli, which is easy to detect because it does not contain any inclusions or substances such as pyrite. For example, Dolomite (Mountain Jade) or Jasper or Howlite marbles are painted with blue resin and polished with oil. In German Neukrish, jade-brown gray powder is melted in a blue process and marketed as Swiss lapis lazuli. Under Chelsea filter, natural lapis lazuli reflects a faint reddish-brown light, while the synthetic type reflects bright red light Tips to remember when buying natural azure. When there is too much white in the stone, it is classified in the cheap calcite class When the color of the stone you want is dark blue-gray, it is probably not lapis lazuli and it is sodalite They usually paint low-quality sodalites and sell them as azure! Many imitation lapis lazuli are found in Taiwan Artificial azure specimens made of golden dots are not visible, but are less common in Gilson synthetic specimens Physically, natural azure rough has a light blue sand color on the glazed porcelain surface. Afghan lapis lazuli has been considered since 6,500 years ago during the Achaemenid period, which was part of Iran. Pakistan in the Chaga Mountains at Bibi Dick, 35 km north of Dalbandian near the Afghan border, Lake Baikal in western Russia where Lapis Lazuli contains Dolomite marble, the Pamirs, South America, the Sinai Peninsula and parts of Iran. Other sources of lapis lazuli are. In general, the deeper the blue lapis lazuli stone, the higher the value of one hand and without cracks and golden streaks of pyrite. Today, Afghan or Persian lapis lazuli has a bluish-purple color and is classified as one of the best types of azure with a small amount of pyrite.