Rogermitchellite is an extremely rare strontium-calcium silicate mineral found primarily within the alkaline igneous complex of Mont Saint-Hilaire. Collectors look for its characteristic clear to pale yellow hexagonal tabular crystals that grow in association with other rare-earth minerals. It is a prized addition for advanced mineral collections specializing in Canadian pegmatites.
Is this rogermitchellite?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch rogermitchellite with a known reference. Rogermitchellite sits at Mohs 3.5, softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Rogermitchellite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Rogermitchellite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: colorless, white, pale yellow.
- 5Look at form & habitCrystal system: hexagonal. Typical habit: tabular crystals.
Often confused with
Rogermitchellite vs. its common look-alikes, and how to tell them apart in the field.
Often found alongside rogermitchellite
Minerals reported to co-occur with rogermitchellite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- Sr₁₅Ca₄Si₁₄O₄₄(OH,F)₈
- Mohs hardness
- 3.5
- Density
- 2.71 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Hexagonal
- Crystal habit
- Tabular Crystals
- Cleavage
- Perfect
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Nepheline Syenite Pegmatites
- Typical price
- $50-300 per specimen
Where rockhounds find rogermitchellite
Classic worldwide localities
- Mont Saint-Hilaire, Quebec, Canada
Field-hunting tip
Look in nepheline syenite pegmatites country, the host setting where rogermitchellite typically forms. If you start seeing analcime, natrolite, sodalite in float, you are in the right ground. Field specimens usually show a tabular crystals habit, so train your eye for that shape before scanning the outcrop.
Common questions
How do you identify rogermitchellite?+
Where is rogermitchellite found?+
How much is rogermitchellite worth?+
What rocks look like rogermitchellite?+
What minerals are found with rogermitchellite?+
What kind of rock does rogermitchellite form in?+
What is rogermitchellite used for?+
Find rogermitchellite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
