How to distinguish between true and false turquoise?

The identification method is as follows:

1, look at the color

Careful observation shows that natural turquoise is warm and saturated; Glued or fake turquoise is dull and has artificial traces.

2, soaking method

There are many holes in the surface of turquoise. Turquoise will absorb water when put into water, and its color will become darker. Pseudo turquoise does not absorb water due to surface treatment. Similarly, in rainy days, turquoise will become deeper because of more water in the air (turquoise with higher porcelain or jade turquoise has high density and weak water absorption, so it takes a long soaking time to see the effect, usually several hours).

There are two kinds of fake turquoise, one is synthetic turquoise, and the other is fake turquoise dyed by Great White Stone in Inner Mongolia. They are characterized by greasy and obscure surface gloss, waxy light instead of fluorescence, uniform overall color and uniform iron wire thickness.

For glued turquoise, glued turquoise is an optimized product of some inferior turquoise. This technology originated in the United States, flourished in China, and was widely adopted and recognized internationally. For example, turquoise is not dark in color, loose in texture and not hard enough, so it can be directly processed.

Because their texture is too soft and brittle, they will break when they touch the saw blade. Such turquoise must be injected with epoxy resin at high pressure to increase its hardness and is not easy to break during processing. It will also be dyed during the gluing process. They are characterized by hard and fuzzy surface gloss.

Extended data

Maintenance of turquoise

Most turquoise has holes, which will absorb hand oil, lip balm, perfume and so on. Although in the traditional craft of our country, the surface of turquoise will be coated with a layer of paraffin to increase the color of turquoise, which also plays a role in protecting turquoise, but when wearing it, we should pay attention to sweat marks, oil stains and so on. Avoid too much contact with cosmetics and skin oil, so as not to damage the gem.

Because turquoise is porous, we should pay attention to avoid using heavy liquid to measure density, because tribromomethane and diiodomethane will discolor turquoise. Turquoise is delicate in color and afraid of pollution. Contact with tea, soapy water, oil stain, rust and alcohol should be avoided to prevent them from infiltrating into pores and discoloring gems. Turquoise is afraid of high temperature, so it can't be baked directly and exposed to direct sunlight to avoid fading, cracking and drying.

Exposure to the sun for a long time will make turquoise crack and discolor due to water loss, and baking at too high a temperature will make turquoise brittle. Some Indian handmade jewelry is exquisitely made and expensive to repair.

However, the thermal conductivity of silver is very high. When repairing silver jewelry, the temperature is difficult to control, and the turquoise embedded in it will break due to high temperature. Because those gems are bonded to metal materials.

References:

People's Network-Identify Turquoise

Reference: People's Network-The know-how of turquoise is clear at a glance.