Morion Quartz Identification Guide

What Morion Quartz Looks Like

Morion is the darkest variety of smoky quartz — so deeply colored by natural irradiation of aluminum-bearing quartz that it appears nearly opaque black, often only showing brown or smoky tones at thin edges or in bright transmitted light. It forms the same hexagonal prismatic crystals as ordinary quartz, with six-sided prisms ending in pyramidal points.

• Color: very dark brown to black (smoky to opaque)
• Luster: vitreous (glassy)
• Transparency: nearly opaque; translucent brown at thin edges
• Habit: hexagonal prisms with pyramidal terminations; often in clusters

Step-by-Step Field ID Checklist

1. Look for crystal form. Six-sided prisms with horizontal striations and pyramidal points confirm quartz — not amorphous glass.
2. Check hardness: Mohs 7 — it scratches glass and steel won't scratch it.
3. Use transmitted light. Shine a strong light through a thin edge: morion glows deep brown/smoky, revealing its quartz nature.
4. Examine fracture: conchoidal, glassy, no cleavage.
5. Note striations. Horizontal growth striations across the prism faces are characteristic of quartz.

Key Diagnostic Tests

• Hardness: 7 (scratches glass cleanly).
• Cleavage: none; conchoidal fracture.
• Specific gravity: ~2.65.
• Crystal habit: hexagonal prisms with horizontal striations — diagnostic.
• Color cause: natural gamma irradiation acting on Al impurities; color can be lightened by strong heating.

Common Look-Alikes and How to Tell Them Apart

• Obsidian / black glass: amorphous, so it never forms crystal faces; obsidian shows curved conchoidal fracture and no hexagonal habit. Morion's prismatic crystals settle it instantly.
• Black tourmaline (schorl): three-sided striated prisms (striations run lengthwise), versus quartz's six-sided prisms with horizontal striations.
• Black/smoky synthetic quartz: physically identical; suspicion arises mainly from uniform color and labeling, not field tests.
• Cassiterite/other black minerals: much denser; a heft test separates them.
• Smoky quartz (lighter): same mineral — morion is just the darkest grade.

Where Morion Quartz Is Found

Morion forms in granites, granite pegmatites, and Alpine-type fissures where quartz grew in the presence of natural radiation. Notable sources include the Swiss and Italian Alps, Ukraine (Volyn pegmatites), the Erongo region of Namibia, Brazil, Madagascar, and the United States (Colorado, New Hampshire). It is essentially deeply irradiated smoky quartz.

Forms, Treatments, and Field Notes

Morion is genuine smoky quartz at its darkest, and a major caution is that much very dark "morion" on the market has been artificially irradiated to deepen otherwise pale quartz. Natural and irradiated morion are physically identical, so the distinction is about disclosure rather than a field test; reputable dealers will say whether color is natural. Either way it is the same durable quartz, hardness 7, suitable for cutting and carving.

Practical viewing tips

The fastest confirmation that a black crystal is morion (and not obsidian, schorl, or another black mineral) is the transmitted-light test: a thin edge or chip glows warm brown rather than staying opaque black. Combine that with the six-sided prism habit and horizontal striations and you have a secure quartz ID. Note that strong heating will progressively lighten morion toward ordinary smoky and eventually colorless, so avoid overheating specimens you want to keep dark.