You found a beautiful jade rosary online — the price was right, the photos looked gorgeous, and the listing said "genuine jade." It arrived, you held it, and something felt... off. It's lighter than you expected. The colour looks too perfect, too uniform.
You're not being paranoid — identifying genuine jade vs glass rosary beads is a real challenge. The word "jade" is one of the most abused terms in online retail. Sellers legally use it for nephrite (genuine), jadeite (genuine but different), serpentine (not jade), aventurine (not jade), dyed quartzite (definitely not jade), glass, and even resin.
Here are five tests you can do right now with no equipment. They take thirty seconds.
Test 1: The Temperature Test (Most Reliable)
| Material | What You Feel |
|---|---|
| Real nephrite | Distinctly cold, 10-15 seconds to warm |
| Glass | Cold initially, warms in 5 seconds |
| Resin/plastic | Room temperature immediately |
| Serpentine | Slightly cool, warms in 7-8 seconds |
Test 2: The Weight Test
| Material | Specific Gravity | Feel |
|---|---|---|
| Nephrite | 2.90–3.03 | Heavy for size |
| Jadeite | 3.30–3.38 | Even heavier |
| Glass | 2.40–2.80 | About right or light |
| Resin | 1.05–1.40 | Obviously light |
Test 3: The Sound Test
- Nephrite: Clear, resonant, bell-like "clink"
- Glass: Sharp, higher-pitched "tink"
- Resin: Dull "clack" — no resonance
Test 4: The Scratch Test
- Nephrite (Mohs 6-6.5): Steel blade slides off, no mark
- Glass (Mohs 5.5): Inconclusive
- Resin (Mohs 2-3): Steel cuts easily — definitive fail
Test 5: The Light Test
- Nephrite: Translucent edges, fibrous internal glow
- Glass: Transparent, uniform, tiny bubbles = definitive
- Resin: Plasticky translucence, no fibrous structure
- Dyed stone: Colour concentrated in cracks
Why Fake Jade Exists (The Economics)
A genuine nephrite bead costs 2-5 EUR to carve. A glass copy costs 0.10-0.50 EUR. Sellers list fakes for 15-40 EUR labelled "natural jade" or "Grade A jade." The profit margin on fakes is enormous. Buy from sellers who disclose the exact stone type, origin, and testing.
Full Comparison
| Test | Nephrite | Glass | Resin | Serpentine |
|---|---|---|---|---|
| Temperature | Cold, slow warm | Cold, fast warm | Room temp | Cool, medium |
| Weight | Heavy | Medium | Light | Medium-light |
| Sound | Musical clink | Sharp tink | Dull clack | Flat |
| Light | Fibrous glow | Clear+bubbles | Plasticky | Waxy |
See our jade education page and materials guide for more detail.