Hardness 7

1 1 birthstone. The color varies from yellow to orange or brown, and the timely price is very cheap because it has a large number of mineral deposits in the earth's crust.

Natural topaz is rare and is usually made of amethyst after heat treatment.

19-20th century was widely used in jewelry, especially in the 1940s and 1950s. It was called "smoke crystal gem" in Victorian Scottish jewelry, and the seal handle of early Victorian desks was often made of faceted topaz.

Counting 16 kinds of yellow gems

Victorian topaz bracelet

2. diamonds

Hardness 10

The coloring element of yellow diamond is nitrogen, and GIA's specifications for colored diamond chromaticity are divided into two categories:

One is based on the color hierarchy (fancy), which is divided into three levels according to the lightness of color: fancy, fancy strong and bright.

The second category is divided into two levels: fancy dark and fancy deep.

Yellow diamonds are common, but they are rare and hard to find.

According to the statistics of American Jewelry Association, less than 5% of the yellow diamonds identified by it are bright yellow diamonds.

Counting 16 kinds of yellow gems

Counting 16 kinds of yellow gems

The first line: Cape diamonds and pure yellow diamonds.

The second line: yellow with orange, yellow with light orange, yellow with brown, yellow with light brown, yellow with light brown.

The third line: yellow with brown and light green, yellow with light brown and light green, yellow with light green.

The fourth line: yellow with green, yellow with gray with light green, yellow with light gray with light green.

3.sapphire

Hardness 9

Sapphire belongs to corundum. All corundum except ruby is called sapphire. Yellow sapphire is much cheaper than blue and red corundum, and its color is made of iron. Colorless to yellowish sapphire will turn dark yellow to brown after irradiation, and will fade quickly when exposed to heat or light.

Counting 16 kinds of yellow gems

Honey yellow sapphire

4. Golden beryl

Hardness 7.5

It belongs to the same family as emeralds, and its color ranges from light yellow to deep golden yellow. Blue or blue-green beryl can be yellow after irradiation, and will fade to its original color after long-term exposure to strong light.

Counting 16 kinds of yellow gems

5. Golden Emerald

Hardness 8.5

In addition to transparent topaz, there are two kinds of expensive varieties-emerald and cat's eye.

Counting 16 kinds of yellow gems