2. The main feature of fluorite is cube, but it is often block with stripes. Common colors are purple, green, yellow, orange and colorless. Transparent to translucent, with weak luster. Because of its low hardness, the surface is easy to wear, so it can be scratched with a knife.
3. The band characteristics of fluorite are similar to agate, but its luster and hardness are much lower than agate, and the band is wide and the boundary is blurred, so there will be no sharp corner transformation. Those with purple or patterned stripes are beautiful in appearance and often make gem necklaces, sculptures, etc. Some only make round beads.
There are many cracks in fluorite, so among counterfeiters, phosphorescent substances will be filled in the cracks to prevent the night pearl from counterfeiting. Fluorite night pearl will have a strong luminescence, but if you look closely, you will find that there is luminescence in the cracks of fluorite, so you can conclude that this night pearl is fake.
Extended data:
Precautions:
1, the hardness of green fluorite is low, so it is very important to maintain fluorite bracelets. Pay attention to avoid mutual wear when wearing, and bumping will also cause surface damage. When not in use, it is best to clean it and put it in a jewelry box.
2. The biggest feature of green fluorite is fluorescence, which is also the main reason why fluorite is loved by everyone. But the fluorescence of fluorite is conditional. Under strong light, the purple color of fluorite will fade and gradually become light green, which is an irreversible chemical process. Therefore, in the maintenance and collection of fluorite, special attention should be paid to prevent the irradiation of strong light.
3. SPAR will have a focusing effect in sunlight. If paper or other combustible materials are placed near SPAR, there is a danger of fire.
Baidu Encyclopedia-Shi Ying