Pennyweight.

Jade: look-alikes and how to tell

Short answer

Jade is commonly confused with serpentine ("new jade"), aventurine, chrysoprase, dyed quartz, treated jadeite (B and C types), glass.

Nephrite, jadeite or serpentine, and whether jadeite is impregnated or dyed.

Look-alikes

What to look at

Bubbles mean glass; mica glints mean aventurine; dye in a network along cracks means a dyed stone.

What settles it

All look-alikes · Stamps

Frequently asked

What can jade be mistaken for?

serpentine ("new jade"); aventurine, chrysoprase, dyed quartz; treated jadeite (B and C types); glass.

How can I tell jade from its look-alikes?

Gemmologist: specific gravity, refractive index and spectrum (treatments).