The three girls are beautiful in appearance and unparalleled in intrinsic value. It is not only a precious gem, but also a symbol of spirit.
Types of gems:
1 and Ruby
The mineral name corundum is a precious gem second only to diamonds, with a hardness of 9, second only to diamonds. Produced in Myanmar, Thailand, Sri Lanka and other Southeast Asian countries. Myanmar is the main producing area of high-quality rubies in the world, among which "pigeon blood red" is the best, followed by pomegranate red and rose red. Ruby is the birthday stone in July, symbolizing enthusiasm and noble character, and has been loved by the world for thousands of years.
2. Sapphire
The mineral composition is the same as ruby, so it is called "sister gem". Sapphire in a broad sense includes all kinds of gem-grade corundum except red, and Indian-occupied Kashmir cornflower sapphire has the best quality, but it has been mined.
In the past, high-quality sapphires were mainly produced in Myanmar and Sri Lanka, and those with brighter sky blue tones were better, followed by indigo and light blue, and were also produced in Shandong, Jiangsu, Hainan and other provinces in China. For the birthday in September.
3. Emerald
As an beryl mineral, it is known as the "king of green gems" because of its special crystal emerald. It is said that its green beauty is beyond the reach of any green gem. Emeralds are the best, and high-quality emeralds are all produced in Colombia.
4, golden green cat's eye
The mineral name is chrysoberyl, and its hardness is 8.5, which is second only to diamonds and rubies. There are many colors such as cyan yellow, honey yellow, yellow brown, etc., with deep honey yellow as the top grade, produced in Sri Lanka. When it has a color-changing effect, it is called metamorphic rock (emerald), which is green in sunlight and red in incandescent lamp. It is also a precious gem.