Landscape Opal Identification Guide
How to identify landscape opal, a common opal showing scenic patterns and pictures within its body.
Read the full Landscape Opal encyclopedia entry →
What Landscape Opal Looks Like
Landscape opal is a variety of common opal (potch) - hydrated silica (SiO2.nH2O) - whose color zoning, dendrites, and mineral inclusions create scenic, picture-like patterns suggesting deserts, hills, or seascapes. Unlike precious opal it usually shows no play-of-color; the appeal is the painted-on scenery. Body colors are typically tan, brown, cream, pink, green, or gray, often in layered or mottled patterns, with a waxy to resinous luster and a translucent-to-opaque body.
Step-by-Step Field ID Checklist
- Identify the picture pattern - horizons, dendrites, or color zones forming a "landscape."
- Check for absence of fire - common opal lacks the flashing play-of-color of precious opal.
- Note the luster - waxy, resinous, or slightly glassy.
- Test hardness - Mohs 5.5-6.5; will be scratched by quartz and a hard knife.
- Feel the weight - opal is light (low density) compared with agate or jasper.
Key Diagnostic Tests
- Mohs hardness 5.5-6.5: Softer than chalcedony (7) - quartz will scratch it; this separates it from agate look-alikes.
- Low specific gravity (~1.9-2.2): Noticeably light in the hand.
- Conchoidal fracture, waxy/resinous luster, white streak.
- No acid reaction; not magnetic.
- Hydrophane behavior: Some common opal may absorb water and change translucency.
Common Look-Alikes and How to Tell Them Apart
- Landscape/picture jasper: Harder (Mohs 7) and denser; a knife won't scratch it, whereas it will scratch landscape opal.
- Landscape agate: Hardness 7, translucent with suspended dendrites; harder and heavier than opal.
- Petrified wood (opalized): May share opal chemistry but shows wood grain/cell structure.
- Precious opal: Shows play-of-color; landscape opal does not.
Where Landscape Opal Is Found
Common opal with scenic patterns is found in many opal regions, including Australia, Mexico, the western United States (Oregon, Nevada, Idaho), Peru, and Madagascar, typically in weathered volcanic and sedimentary rocks where silica-rich solutions deposited opal.
Frequently asked questions
How can you tell if it's real landscape opal?
Real landscape opal is common opal: it is relatively soft (Mohs 5.5-6.5, scratched by quartz), notably lightweight, has a waxy to resinous luster, and shows scenic patterns without the flashing play-of-color of precious opal.
What does landscape opal look like?
It is a tan, brown, cream, green, or gray opal with layered or dendritic patterns that form picture-like scenes of deserts, hills, or seascapes, usually with no fire.
Landscape opal vs picture jasper - how do you tell them apart?
Picture jasper is hardness-7 chalcedony that a knife cannot scratch and is denser, while landscape opal is softer (5.5-6.5), lighter, and has a more waxy or resinous luster.
Does landscape opal have fire or play-of-color?
No. Landscape opal is a common (non-precious) opal valued for its scenic patterns; it does not display the shifting rainbow play-of-color seen in precious opal.