Every Monday Mine - Permeable Gypsum

What I want to introduce to you today is the transparent gypsum with the same ingredients as chalk~

Translucent gypsum is also known as transparent gypsum, which is "transparent gypsum". His composition is the same as the plaster (and chalk) we put on when we break a bone, it's calcium sulfate dihydrate.

Its crystals appear in shape, block or fine grains, and the surface will appear glass, silk or pearl luster.

(The above is taken from Wikipedia - Gypsum )

Gypsum is as common on earth as Chinese cabbage, so it is widely used in human civilization. In the construction industry alone, it has several uses.

The chalk used by school teachers to teach, the bean curd sold in the summer ice shop, the tofu that Fujiwara Takumi was not allowed to break when he flicked his tail, the cement retarder needed for grand buildings, and even the building materials of the building itself... Human beings In the civilization of China, the common but great contribution of gypsum can be seen everywhere.

The English name of gypsum is called Selenite, and its English name is derived from the Greek selēnitēs (lithos), which means "stone from the moon". I can't help but admire the ancient Greeks' abundant and appropriate associations with these beautiful objects on the earth, and I am also amazed at the miracle of the creator, so that minerals with the same chemical composition are not only as beautiful as the moon, and have the value of appreciation, but also can It has brought such a wide range of contributions to human civilization, ranging from the enduring art palace to the most common food in the mouth.