It is said that the birthstone in the national calendar is related to the twelve cornerstones in the Bible, the twelve precious stones on the breastplate, the twelve Islamic angels and the legend of the zodiac in the Heavenly Palace. With the passage of time, it has become a custom to wear the birth moon gem. January birthstone: garnet-equiaxed crystal system; Hardness 7.5; Garnet has various colors, and the most common color is maroon or maroon, which represents friendship, chastity and loyalty. Representative constellation: Aquarius (February19 ~ March 20th) February birthstone: amethyst amethyst-hexagonal system; Hardness: 7; Amethyst belongs to the seasonal family, which often brings happiness, but it also has the meaning of calming the mood! It can bring good luck and keep peace forever. Representative constellation: Pisces (February19 ~ March 20) March Birthday stone: aquamarine-hexagonal system; Hardness 7.5; Aquamarine and emerald are "cousins" and both are beryl gems, the best of which is a slightly dark, slightly blue and slightly green tone, which is a sailor's amulet. It symbolizes wisdom. Representative constellation: Aries (March 21~ April 20) April birthday stone: diamond-equiaxed hardness: 10 (the hardest material known at present) Diamond is the king of jewelry and the highest hardness among known natural minerals, symbolizing perseverance, eternity and purity, and is regarded as perseverance. Representative constellation: Taurus (April 2 1 ~ May 21) May Birthday Stone: Emerald-Hexagonal Hardness: 7.5 Emerald, together with diamond, ruby and emerald cat's eye, is known as the four most precious stones in the world, and its rich green color makes people fondle it. Emerald is more or less flawed, which is called defect garden. It symbolizes nobility and elegance. Representative constellation: Gemini (2 1 year from May 22nd to June 22nd) June Birthday Stone: Emerald (metamorphic rock)-Orthogonality Hardness: 8.5 Emerald (metamorphic rock) is green in the sun and red in the tungsten lamp. So it's called: emerald by day, ruby by night. Representative constellation: Cancer (June 22 ~ July 22) July Birthday Stone: Ruby Ruby-Tripartite hardness: 9 Ruby is a natural gem mineral, and its hardness is second only to that of diamond. Generally speaking, the value of a good ruby is often higher than that of a diamond of the same grade. It is said that those who have it will be endowed with health, love and a successful career. Representative constellation: Leo (July 23 ~ August 23) August birthstone: olivine olivine-plagioclase system; Hardness: 6.5 In ancient times, olivine was called "the treasure of the sun". Its color is yellow-green, and it has a velvet appearance, so it is the best. It has the meaning of friendship and is often used as religious jewelry. Representative constellation: Virgo (August 24-September 22) September Birthday Stone: Sapphire Sapphire-Hexagonal Hardness: 9 Sapphire is a kind of corundum, and those non-red corundum with gem characteristics are all sapphires, so they will show many colors, but the clear dark blue sapphire is the most precious. Since the middle ages, it has symbolized the tranquility of heaven, which can make the wearer calm and friendly and restrain evil and unclean thoughts. Representative constellation: Libra (September 23rd ~ 65438+1October 23rd) October Birthday Stone: Opal is an amorphous gem with a unique "color-changing effect". The most common opal is the one with rainbow color, but it is also transparent, not milky white. It symbolizes purity and hope. Representative constellation: Scorpio (65438+1October 24th ~165438+1October 22nd)1/moonstone: topaz topaz-rhombic crystal system; Hardness: 8 Topaz is also called topaz. There are varieties of various colors, among which yellow and pink are the most expensive, and there are also varieties of blue and green. The name topaz comes from the Sanskrit word tapus, which means fire color. Legend has it that putting topaz with gold around the neck can dispel bad omen, treat amblyopia and calm anger. Representative constellation: Sagittarius (165438+1October 23rd ~ 65438+February 2nd1)1February birthstone: turquoise, also known as Turkish jade. It belongs to one of the earliest mined gems and is valued for its strong color. It symbolizes success and stability. Representative constellation: Capricorn (65438+February 22nd ~ 65438+1October 20th).