1, Pearl

Pearls have medicinal value. According to the research of geology and archaeology, there were pearls on the earth 200 million years ago. According to western legend, Venus was born in a shell. When the shell was opened, the dew dripping from her became a crystal clear pearl.

Danes associate pearls with mermaids. Mermaids miss the prince but can't. They shed tears and were treasured by the Fritillaria and mussels they guarded. Over time, tears turn into pearls. Pearls are "the favorite of the sea". Pearls with magnificent colors and elegant temperament symbolize health, purity, wealth and happiness, and have been loved by people since ancient times.

It is not suitable to contact perfume, oil, salt, alcohol, hair cream, vinegar and dirt in daily life; It is even more impossible to contact organic solvents such as banana oil; In summer, the human body sweats a lot and is not suitable for wearing pearl necklaces. When not in use, gently clean it with high-grade neutral soap or detergent, and then dry it. Exposure or exposure in the sun is not allowed. When collecting, you can't use mothballs, and don't put them in the bank vault for a long time.

2. coral

Dividend, white, is a marine coelenterate fossil. Divided into red coral [expensive coral], white coral (mostly used in bonsai craft), blue coral (now basically extinct), black coral (expensive) and golden coral (with clear spots on the outside). When sweating, don't wear coral ornaments for a long time, because sweat will corrode corals; Do not touch perfume, alcohol, salt, oil or vinegar.

Red Coral Gem: "Pearl of the Sun" is the largest and most perfect coral bead found in the world so far. This bead is 20.4mm in diameter and is produced in the sea area of Taiwan Province Province. It belongs to the high-quality aqua in coral jewelry. The round beads are flawless and extremely rare and precious. It is set with 18K white gold diamonds and decorated with three natural emeralds. Exquisite craftsmanship, unparalleled. After reading it, it was amazing!

3. Amber

Easy to melt, afraid of heat, afraid of exposure, amber products should avoid direct sunlight and should not be placed in high temperature places; Amber is easy to dehydrate and crack when it is too dry. Amber is an organic substance, easily soluble in organic solvents, such as nail polish, alcohol, gasoline, kerosene, heavy liquid, etc., and should not be placed in cosmetic cabinets.

Amber is fragile and has low hardness, so it is not suitable for external impact. Friction and scratches should be avoided to prevent scratches and breakage. Women in ancient Rome had the habit of holding precious stones in their hands. The reason is that amber will give off a faint fragrance when heated at the temperature of the palm.

The ancient Romans gave amber a very high value, and a small statue carved with amber was more valuable than a strong slave. Amber can also relieve pain and relieve shock. In some places, a string of amber is often hung on children's chests to ward off evil spirits and relieve shock.

Extended data:

* * * organic gemstones;

1. Most organic gems are composed of inorganic and organic substances. Inorganic substances are mainly carbonate, phosphate, a small amount of sulfate and water. Organic substances are mainly keratin, amino acids, ester acids and ester alcohols.

2. Mohs hardness is low, Hm=2.5-4.

3. Carbonate is easily corroded by acid, which destroys organic gems. Acids include vinegar, acidic drinks and sweat acid.

4. Organic matter is easily eroded by organic solvents and volatile gases. Organic solvents include alcohol, ether and acetone; It also includes some cosmetics such as nail polish. Volatile gas: aromatic and volatile moth-proofing drugs such as mothballs destroy organic substances in gemstones.

5, a wide range of uses: as ornaments, decorations, clothing, as niche decorations, beads; And it has extremely high medicinal value, and it is all precious medicinal materials.

6. Organic gemstones need to be maintained.

Baidu encyclopedia-organic gem