The number, shape and structure of shells vary greatly, and some types are 1 spiral shells (such as snails, snails and abalone); Some species have two petal-shaped shells (such as mussels and cockroaches); Some species have eight plate-like shells arranged in tiles (such as stone turtles); Some kinds of 1 shells are wrapped in the body (such as squid, squid); Some kinds of shells even completely degenerate (such as ship maggots). The main components of shells are 95% calcium carbonate and a small amount of shellfish. Generally can be divided into three layers. The outermost layer is dark brown cuticle (shell skin), which is thin and transparent and has the function of preventing carbonic acid erosion, and is composed of chitin secreted by the edge of the mantle; The middle layer is prismatic layer (crust), which is thick and consists of prismatic calcite secreted by the mantle edge. The outer layer and the middle layer can enlarge the area of the shell without increasing the thickness. The inner layer is the nacre (bottom layer), which is composed of phyllodes secreted by the whole surface of the mantle. It has a beautiful luster and can be thickened with the growth of the body. The main chemical composition of calcite and aragonite is CaCO3. There are many concentric and annular growth lines on the outer layer of the shell, and the light and dark colors alternate, but they do not represent age; It is formed because the edge of the mantle can't continue to secrete for some reasons (lack of food, different seasons, reproductive period, etc.). ). shell

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Edit this commercial shell ornament

The shell of a shellfish, such as a clam. Some of them have pearl-like iridescent luster, so they are used in jewelry industry to make necklaces and clothing accessories (buttons, etc. ), even installed on jewelry, more used to make shell carvings, collages, inlaid handles, etc. Among all kinds of shells, Pinctada martensii in the Torres Strait in northern Australia, Pinctada Manila in the Philippines, Pinctada burma in Myanmar, Giant mussel and Queen mussel in the West Indies are the best. A century ago, the deep-sea pearl oyster was a symbol of luxury and splendor of European aristocrats. It has a charming luster and changing colors like pearls, but it also has colorful colors different from pearls. Breeding shell carving

The colorful pearl shell has never been ignored and buried for thousands of years. In the late Qing Dynasty, mussel shells and other shellfish were polished into buttons in Hangjiahu area and decorated on high-end clothes. They have always been the best friends cherished by designers. Especially in the past two years, jewelry-grade shellfish ornaments have been more and more loved by people who like handsome and natural in our city. Mother-of-pearl is a natural material, so the color and texture of each piece are very unique, which meets the demand of more and more consumers for personalized jewelry. The processing of mother-of-pearl jewelry is very complicated, and the original mother-of-pearl should be polished, cut and inlaid in detail according to the design requirements. After many processes, it can be made into pleasing shell ornaments. Edit this decorative shell handicraft.

A small shell can also play a big role. Fan-shaped, spiral, large and small, with a little processing and hanging, you can escape the fate of being thrown away, which is beautifully displayed on the wall and desktop. A large area of scalloped shells are completely decorated on the inner wall of the wooden bowl through a special process, which makes the bowl more environmentally friendly to use. And if you put on a beautiful pearl, make a curtain and decorate it in front of the window, the home scene with Southeast Asian flavor will be presented immediately. If you put it by the sea, you will use it to listen to the sound of the sea, but it is very useful in a natural style home. Curtain buckles and small rings, shells can make your home show the scenery of Southeast Asia without decoration. Shell wind chimes

The small conch picked up by the sea is smooth, round and shiny, and the two are paired together to make the hanging ring of the curtain buckle.

Beautiful as ever. When they are attached to the curtains at home, the curtains will also be contaminated with the flavor of Shanghai style. There is almost no need to transform, as long as there are shells with similar shapes and sizes. Shells are made into tableware. Forks and spoons, each with its own purpose, are very interesting to put on the dining table. Shells are divided into five classes: Gastropoda (snails, snails), Cephalopoda (parrots, octopus), Polypoda (ivory) and Bivalves (bivalves). Edit this paragraph for other purposes. Shells used as money in ancient times.

In ancient times, shells were also used as money to edit this pearl.

Pearl is an ancient organic gem, which is produced in mollusks such as Pinctada and Pinctada. The calcium carbonate-containing mineral (aragonite) beads produced by endocrine function consist of a large number of tiny aragonite crystals. According to the research of geology and archaeology, there were pearls on the earth 200 million years ago. The international gem circle also lists pearls as lucky stones for June birthday and commemorative stones for 13 and 30th wedding anniversary. Pearls with magnificent colors and elegant temperament symbolize health, purity, wealth and happiness, and have been loved by people since ancient times. A typhoon in 2006 was named "Pearl". Edit this paragraph to explain in detail 1. "The Warring States Policy Qin Ce V": "The palace of the monarch hides pearls and precious stones." Tang Lixian used the poem "Fu Gui Qu": "The pearl wins the poverty of the Dragon Palace and scratches the back of the people." 2. Real pearls from mussels. Song Ming Ying Xing's "Heavenly Creations and Jade Beads": "Every pearl must give birth to a clam belly ... after the longest years, it is a treasure." 3. refers to the pearl curtain. Ma Yuan Zhiyuan's "Little Peach Four-son House Summer" song: "Twelve beads are hung on the curtain, and swallows come and go." Chen Qing Song Wei's "Drunken Flower Yin Chongyang and Shu Yuyun" words: "Tonight is Chongyang, not a ball, and the west wind blows." Pearl's English name is Pearl, which comes from the Latin Pernulo as Pearl-unstatistered. Its other name, Margaret, comes from ancient Persian Sanskrit, which means "son of the sea". As early as ancient times, when primitive humans were foraging by the sea, they found white pearls with colorful auras and were attracted by their crystal splendor. Since then, pearls have become people's favorite ornaments and have been passed down to this day.

The types of shells are tiger-spotted shell, white jade shell, luminous shell, five-claw snail, pig mother snail, pearl shell, chaste snail, tangguan snail, heptapod shell, pig ear shell horseshoe snail, bighorn snail, phoenix snail, conch, cap snail, conch, tangguan snail, jade snail, octopus, quail snail, snail, bullet snail and so on. Sunshine cherry clam, Pacific fox clam, angel wing gull clam, Xiufeng clam, oil painting sea fan clam, solid color sea chrysanthemum clam, safflower snail, yellow snail, lamarckian snail, West African cherry clam, snow mountain snail, eye spot snail, white star snail, map snail, black star snail, golden snail, fox snail, rat snail and long nose snail. Golden brown bullet snail, golden fist phoenix snail, lip-moistening phoenix snail, crystal phoenix snail, small loquat snail, swollen loquat snail, cock phoenix snail, Darkmouth phoenix snail, golden axe phoenix snail, Gu Mi snail with cloud spot, reticulate long nose snail, big red snail, snipe snail, long fist snail, long fragrant snail, biting snail, long snail, giant hand snail and so on. Black tooth snail, buck tooth snail, orange mouth snail, brown line snail, left-handed snail, spiral staircase snail, ginkgo snail, thick tumor snail, vase snail, flame snail, Taiwan Province jujube snail, awl snail, thin Tang snail, sea rabbit snail, purple sleeve snail, precious stone snail, big wheel snail, purple snail, mixed bell snail and vase snail.