A Comparison between Jade and other Similar Precious Stones

T

Name

Hardness

Density (g/cm3

Color

Refractive Index

Other Features

Jadeite

6.5-7

3.34

Green, emerald green, white, red

1.66-1.68

Green color under Chelsea colour filter; absorption band in red and purple zone

Nephrite

6-6.5

2.95

White, yellow, olivine, dark green, black, etc.

1.606-1.632often 1.621

No response under Chelsea colour filter.

Chalcedony

6.5-7

2.60

Green, light green, red, blue, milk white, etc.

1.535-1.539

Green color under Chelsea colour filter; absorption band in orange zone

Dong Ling Stone

7

2.65-2.80

Fresh oil green, red, blue and white

1.544-1.560

在油绿底色上闪耀着光芒四射的小

Mi County jade

7

2.63-2.70

Emerald green, light green, bean green, red, white, black, etc.

1.544-1.533

Contain: chrome, nickel, copper, iron, titanium, pitch, etc.

Beijing white jade

7

2.64-2.66

Even white ( few impurities)

1.54

Quartz grain is smaller than 0.2mm. The texture is fine , compact and pure.

Guizhou green jade

7

2.65-2.70

Emerald green, sky blue, light green, grey yellow, red, etc.

1.54-1.55

Contain: green kaolinite (uneven distribution)

Calamine

5

4.30

White, green, yellow, red, brown, purple, etc

1.621-1.849

Green color under Chelsea colour filter; bubble with cold diluted hydrochloric acid

Phosphor aluminium stone

4-5

2.53-2.57

Colorless, white, light red, green, yellow, sky blue, etc.

1.564-1.590

Colloidal, with red strip

Essonite

Transvaal jade

7

3.61

Emerald green, green, olivine, yellow, light yellow

1.735

Orange fluorescence under x radial, weak green or orange fluorescence under ultraviolet radiation.

Hydrogrossular

Californite

Zoisite

6-7

3.30

Green, dark green, blue, brown, pink, yellow, purple, etc.

1.691-1.704

Multi-color. Green color under Chelsea colour filter.

Emerald

7.5-8

2.67-2.78

Emerald green, strong green, oil green, etc.

1.566-1.600

Multi-color. Green color under Chelsea colour filter.

Idocrase

6.5

3.40

Green, blue green, dark green, olivine, white, etc.

1.713-1.718

Green color under Chelsea colour filter; Strong absorption band in blue zone.

Serpentine

2.5-4

2.57

Green, deep green, black, olivine, white

1.56-1.570

Green color under Chelsea colour filter; Strong absorption band in blue zone.

Prehnite

6-6.5

2.88

Green, deep green, olivine, hoariness, white

1.615-1.646

Green color under Chelsea colour filte;

Amazonite

6-6.5

2.56

Patina, olivine, sky blue

1.522-1.530

Green color under Chelsea colour filte

Nan Yang Jade

5.4-6.4

2.73-3.18

Very rich colour scheme, such as green, purple, yellow, red, white , etc.

1.56-1.70

Due to very rich color scheme, this jade is also called “multi-color jade”.

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