Slab = disk polished on one side.
ECHTE JADE - Black amphibole nephrite
The polished surface has such an intense mirror shine - capturing this with our camera was unfortunately only partially successful.
So in natural high-gloss black.
Nephrite belongs to the real jade minerals like Jadeite and Maw Sit Sit -
tough, compact, dense felt - therefore difficult to cut but great to polish.
The raw piece comes from the Jade Fields in Central Wyoming - USA
Weight: 370 g
Dimensions: 11 x 10 x 2 cm
The "black jade" is highly valued as jewelry, especially in Asia, and is sold at carat prices.
The last picture shows the back - sawn but not polished.