Jade Gemstones – Properties, Origins, Treatments and Buying Guide

Jade is a legendary gemstone, valued for its rich green hues and historical significance across cultures. Unlike brightly coloured stones, jade is prized for its smooth texture, translucency, and toughness, making it ideal for intricate carvings and fine jewellery.

In this guide, we examine jade from a gemmological and commercial perspective, covering its physical properties, crystal structure, treatments, origins, and how to identify high-quality stones.

Jade is a durable gemstone that exists in two mineral varieties: nephrite (calcium magnesium silicate) and jadeite (sodium aluminium silicate). Both forms are highly valued for their rich green shades and smooth, waxy lustre.

Jade forms in metamorphic rocks and occasionally in hydrothermal deposits, often producing dense, tough material suitable for carving, beads, and cabochons.

Jade has two primary forms:

Jadeite: NaAlSi₂O₆ – sodium aluminium silicate
Nephrite: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ – calcium magnesium silicate

Trace elements, including iron and chromium, influence its colour, creating the spectrum of greens for which jade is celebrated.

Jade belongs to the silicate mineral family.

Jadeite: Monoclinic crystal system

Nephrite: Monoclinic but fibrous structure

Its interlocking fibrous texture gives jade exceptional toughness, making it far stronger than many gemstones of similar hardness.

Jade combines rich colour, translucency, and remarkable toughness, allowing it to be carved into intricate jewellery or decorative pieces without chipping.

Lustre
Waxy to vitreous, giving jade its characteristic smooth appearance.

Transparency
Translucent to opaque; highest value stones are semi-transparent and evenly coloured.

Refractive index
Jadeite: 1.66 – 1.68
Nephrite: 1.60 – 1.63

Specific gravity
Jadeite: 3.3 – 3.5
Nephrite: 2.95 – 3.1

Jade occurs in:
Rich emerald green
Apple green
Pale green
White jade
Lavender (rare)
Black and grey varieties

Even colour distribution and translucency dictate the highest commercial value.

Jadeite and nephrite have a Mohs hardness of 6 – 7, but exceptional toughness due to interlocking fibres makes them suitable for rings, pendants, beads, and carvings.
Jade resists chipping better than most stones of similar hardness.

High-quality jade is generally untreated. Common treatments include:

Surface waxing to enhance lustre

Low-pressure polymer impregnation (Grade B jade)

Untreated, top-grade jade is called “Grade A” and is most sought after.

Avoid ultrasonic and steam cleaners.
Do not expose to acids or harsh chemicals.
Clean gently with mild soap, warm water, and a soft cloth.
Store separately from harder gemstones to prevent scratches.

Major sources of jade include:

Myanmar (Burmese jadeite)
Guatemala
China
Russia
Japan
USA (Wyoming, Alaska)