Nine distinguishing points of natural crystal

Natural quartz, also known as quartz stone, is crystallized in a natural environment of certain temperature and pressure. The composition is silica. The color is mostly colorless and transparent (a small amount is mixed with impurities due to environmental changes in the crystallization process, forming purple, brown, green, pink, gold-like, coral-like, and other colors and forms), the hardness is about 6-8, melting point At 1713°C, pure natural crystals of water are the best optical materials. Today, the wraps in the body of crystals are varied and vivid, and they are highly appreciated and collected. The important sign of natural crystals is: cotton and ice cracks, but the natural judging criteria for the best natural crystals are that cotton is hard to see with the naked eye, and ice cracking is rarely scarce.

This is a natural crystal (including: amethyst, pink crystal, white crystal, tea crystal, hair crystal and other natural crystal varieties) is the basic physical characteristics, then to distinguish the natural crystal true and false, we should first understand this understanding.

Steps/methods:

1. Seeing: In the formation process of natural crystals, there are always some impurities in the environment. When observing the sun, you can see faint and even stripes or catkins. The fake crystals are mostly made of slags and glass smelts that have been smelted. After grinding and coloring, there are no uniform stripes or catkins.

2. Tongue licking: Even in the hot summer days of the dog days, using the tongue to lick the natural crystal surface, there is also a feeling of cold and cool. Fake crystal, no cool feeling.

3. Light: Natural crystals are placed under the sunlight. No matter what angle they are viewed, they can give off beautiful brilliance. Fake crystal can not.

4. Hardness: The hardness of the natural crystal is large. Grab the stone gently on the jewelry and leave no trace. If there are stripes, it is a fake crystal.

5. Examination with a polarizer: In the polarizer, 360 degrees of rotation are natural crystals with four dark changes, and no changes are false crystals.

6. Check with two colors: Natural amethyst has dichroism and false crystal has no dichroism.

7. Use a magnifying glass to check: Use a ten-fold magnifying glass to check under transmitted light. The bubble can be basically found as false crystal.

8. Check with the hair: The crystal is placed on a hair. If the human eye sees the double shadow of the hair through the crystal, it is a natural crystal, mainly because the crystal has birefringence.

9. Detect with a thermal conductivity meter: Adjust the thermal conductivity meter to the green 4 grid test gems. The natural crystal can rise to the yellow square, while the false crystal does not rise. When the area is large, it rises to the yellow grid.

Precautions:

The important sign of natural crystals is: cotton and ice cracks, but the natural judging criteria for the best natural crystals are that cotton is hard to see with the naked eye, and ice cracking is rarely scarce.