Raw Stones
271 pieces
Tumbled Stones
202 pieces
Palm Stones
37 pieces
Crystal Points
38 pieces
Clusters & Geodes
63 pieces
Polished & Decor
125 pieces
Mineral Specimens
70 collector pieces
Crystal Chips
22 pieces
Browse everything
Every collection, one page.
View All Collections →
Aries
Mar 21 – Apr 19
Carnelian
›
Taurus
Apr 20 – May 20
Rose Quartz
›
Gemini
May 21 – Jun 20
Agate
›
Cancer
Jun 21 – Jul 22
Moonstone
›
Leo
Jul 23 – Aug 22
Citrine
›
Virgo
Aug 23 – Sep 22
Amazonite
›
Libra
Sep 23 – Oct 22
Blue Lace Agate
›
Scorpio
Oct 23 – Nov 21
Obsidian
›
Sagittarius
Nov 22 – Dec 21
Sodalite
›
Capricorn
Dec 22 – Jan 19
Black Tourmaline
›
Aquarius
Jan 20 – Feb 18
Amethyst
›
Pisces
Feb 19 – Mar 20
Aquamarine
›
Gifting?
A birthday stone is the safe bet.
Read the zodiac guide →
Iris Agate
Iris Agate is silicate (finely banded chalcedony), SiO₂. In the hand, it rates 6.5 to 7 on the Mohs scale, and it runs pale gray-white by day and full spectral rainbow when backlit thin. A plain-looking pale agate slice that detonates into rainbow stripes when light shines THROUGH it, banding fine enough to diffract light itself.
The geology.
Iris Agate carries the formula SiO₂. It belongs to the trigonal (cryptocrystalline) system. Catalogues list it as silicate (finely banded chalcedony).
It sits at 6.5 to 7 on the Mohs scale. The surface reads waxy; spectral in transmitted light. Light behaviour is translucent (thin slices). Specific gravity runs 2.58 to 2.64. The streak is white. It breaks with conchoidal fracture.
A plain-looking pale agate slice that detonates into rainbow stripes when light shines THROUGH it, banding fine enough to diffract light itself.
It reaches buyers as thin polished slices or slabs cut across fine banding.
The origins.
Fine-banded agates worldwide, classic iris material from Oregon and Montana (USA), Indonesia, India.
On value, the database notes: mid-range; strong full-spectrum slices are collector treasures.
Traditional associations.
In energy work traditions, associated with hidden potential revealed in the right light.
We keep this section because people ask. It sits below the geology on purpose, and none of it describes something the stone does.
Spotting the real thing.
A plain-looking pale agate slice that detonates into rainbow stripes when light shines THROUGH it, banding fine enough to diffract light itself.
| Looks like | How to tell them apart |
|---|---|
| Dyed agate | Dyed rainbow color shows in reflected light; iris color appears ONLY backlit and shifts with angle |
| Opal | Opal's play-of-color works in normal light from patches, not parallel band spectra |
| Ordinary banded agate | Most agate has bands too coarse to diffract, no backlit rainbow |
At-home tests.
Before anyone talks you into a lab report, these are the checks worth doing yourself on iris agate.
| Test | What you should see |
|---|---|
| Backlight a thin slice | spectral rainbow bands appear |
| By eye | Color moves as you tilt (diffraction, not pigment) |
| Scratch check | Standard agate hardness |
Stop short of anything that leaves a mark. A gemologist can answer the rest without damaging the stone.
Care & handling.
At 6.5 to 7 on the Mohs scale it handles careful wear but scratches against quartz and dust. Store it separately and take rings off before rough work.
It breaks with conchoidal fracture, which is worth knowing before you set it or drop it.
Skip the ultrasonic. Lukewarm water, mild soap and a soft cloth handle routine cleaning without risk.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is SiO₂. Crystal system: Trigonal (cryptocrystalline). Specific gravity: 2.58 to 2.64. Streak: White. Cleavage and fracture: Conchoidal fracture.
How it reaches the market
Fine-banded agates worldwide, classic iris material from Oregon and Montana (USA), Indonesia, India.
What it gets confused with
Dyed agate: Dyed rainbow color shows in reflected light; iris color appears ONLY backlit and shifts with angle. Opal: Opal's play-of-color works in normal light from patches, not parallel band spectra. Ordinary banded agate: Most agate has bands too coarse to diffract, no backlit rainbow.
What it is worth
Mid-range; strong full-spectrum slices are collector treasures.
One more thing
Iris agate's bands can exceed 10,000 per inch, a natural diffraction grating rivaling engineered optics.
An education-first guide.
We do not carry iris agate. This page exists because the question comes up and the honest answer is worth writing down, whether or not there is anything here to sell you.
Explore the Crystal Guide