99% of the pearl is calcium carbonate
In a poem of the Tang Dynasty, Du Fu described a very confusing and annoying thing. "The guest came from Nanxun and sent me a spring guest. There is a hidden word in the pearl. I want to distinguish it from a book. For a long time, the public must be opened. The vision is turned into blood, and the sorrow is not collected. The poetic meaning is that a guest came from the south, he gave the poet a pearl, and the pearl has a pattern or handwriting. The poet was treasured in a bamboo box. After a long time of watching it, it was found that the pearl was gone, leaving only some red liquid.
The pearl is formed by the accumulation of secreted substances in the mantle of the pearl shell. More than 99% of the pearl is calcium carbonate. In addition, it contains a small amount of organic matter, some metal elements and fine water droplets. Calcium carbonate is hardly soluble in water. However, it can be converted into an acid salt under acidic conditions to dissolve: CaCO3+CO2+H2O=Ca(HCO3)2. The house where Du Fu lived was damp and wet. The bamboo box had no moisture-proof performance. After encountering carbon dioxide gas in water and air, the pearl changed chemically and became a red liquid. Du Fu did not know these chemical knowledge at the time, so he would be confused. solution.
In Li Shangyin's "Jin Se", there are "the tears of the moon and the moon, and the warmth of the blue sky." The bead is born in the 蚌, the 蚌 lies in the sea. In mythology, whenever the moon is quiet, the scorpion will open to the moon to raise its pearls, and the pearls will be moonlit. This is a beautiful folk tradition. The moon in the moon, the pearl is like the moon in the water; the tears are beaded, since ancient times, the tears of the people, the beads, and the strange scenery in the sea. In this way, the moon falls between the Bohai Sea, the pearl baths in the world of tears, the moon, the beads, the tears, and the poet's pen, has formed an indistinguishable wonderland.
Calcium and magnesium silicate "constitute" jade
There are many jade in ancient poetry. "The Book of Songs, Guofeng, Weifeng, and Papaya" has "pitch me with papaya, and report it to Qiong.... I voted for the peach, and reported it to Qiongyao.... vote for me. Take Mu Li, and report it to Qiong. "Qiong, Qiongyao, and Qiongyi are all beautiful jade. You give me fruit. I will give you a beautiful jade, which reflects a noble feeling of human beings. "The Book of Songs, Guofeng, Zheng Feng, and the lesbian car" have "will be Xiang Xiang, Pei Yu will be."
Jade is warm and transparent. Its main component is composed of two minerals, tremolite and actinolite. They are all silicates of calcium and magnesium. The amphoteric stone also contains a small amount of iron, so the color is slightly darker than tremolite. some. Nephrite is formed when the crystals of tremolite and actinolite are very small and closely combined with each other into a block. The actual texture of nephrite is not soft, the hardness and glass are almost the same, and there is a certain degree of toughness. Therefore, the ancients used nephrite to make axe, knife, sword and other ornaments.
In the "Nine Days Going High" of the Tang Dynasty, Wang Changling had "cut flowers and flowers, and the emeralds swayed and danced." Li Bai's "Gifts of Sima" contained "Jade Gold, embroidered into a song and dance gown." Jade, also It is called jade jade, jade jade, jadeite, and jade jade. It is a kind of jade, and its color is emerald green (called Cui) or red (called 翡). It is a jade-like polycrystalline aggregate formed mainly of jade, omphacite and sodium chromite during the geological process. Emerald is a pyroxene type, monoclinic system, and two groups are completely cleavage. The main composition is sodium aluminum silicate (NaAl-Si2O6), and more than 50% of sodium silicate in gemstones is considered as jadeite. Emerald is produced in metamorphic rock formations formed under low temperature and high pressure, often accompanied by blue amphibole, muscovite, hard pillar (dihydrate feldspar), vermiculite and quartz. The Mohs hardness is between 6.5 and 7, the specific gravity is between 3.25 and 3.35, and the melting point is between 900 and 1000 °C.
A Votive Candle or prayer candle is a small candle, typically white or beeswax yellow, intended to be burnt as a votive offering in an act of Christian prayer, especially within the Anglican and Roman Catholic Christian denominations, among others.In Christianity, votive candles are commonplace in many churches, as well as home altars, and symbolize the "prayers the worshipper is offering for him or herself, or for other people."The size of a votive candle is often two inches tall by one and a half inches diameter, although other votive candles can be significantly taller and wider.
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