Geological Outreach
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Reposted by Geological Outreach
Reposted by Geological Outreach
338 of #365Minerals 🧪⚒️
Hibonite:
- Calcium aluminium oxide mineral
- Sometimes contains cerium
- 7.5-8 on the Mohs hardness scale (similar hardness to topaz)
- Found in some high-grade metamorphic rocks
- Named after Paul Hibon, a French prospector who discovered it in 1953 in Madagascar #minerals
Hibonite:
- Calcium aluminium oxide mineral
- Sometimes contains cerium
- 7.5-8 on the Mohs hardness scale (similar hardness to topaz)
- Found in some high-grade metamorphic rocks
- Named after Paul Hibon, a French prospector who discovered it in 1953 in Madagascar #minerals
December 4, 2025 at 10:36 AM
338 of #365Minerals 🧪⚒️
Hibonite:
- Calcium aluminium oxide mineral
- Sometimes contains cerium
- 7.5-8 on the Mohs hardness scale (similar hardness to topaz)
- Found in some high-grade metamorphic rocks
- Named after Paul Hibon, a French prospector who discovered it in 1953 in Madagascar #minerals
Hibonite:
- Calcium aluminium oxide mineral
- Sometimes contains cerium
- 7.5-8 on the Mohs hardness scale (similar hardness to topaz)
- Found in some high-grade metamorphic rocks
- Named after Paul Hibon, a French prospector who discovered it in 1953 in Madagascar #minerals
Reposted by Geological Outreach
333 of #365Minerals 🧪⚒️
Anorthoclase:
- A potassium-rich variety of albite
- Forms in sodium-rich volcanic rocks
- Its name comes from the Greek words for oblique and fracture, because of its cleavage angle #minerals
Anorthoclase:
- A potassium-rich variety of albite
- Forms in sodium-rich volcanic rocks
- Its name comes from the Greek words for oblique and fracture, because of its cleavage angle #minerals
November 29, 2025 at 11:55 AM
333 of #365Minerals 🧪⚒️
Anorthoclase:
- A potassium-rich variety of albite
- Forms in sodium-rich volcanic rocks
- Its name comes from the Greek words for oblique and fracture, because of its cleavage angle #minerals
Anorthoclase:
- A potassium-rich variety of albite
- Forms in sodium-rich volcanic rocks
- Its name comes from the Greek words for oblique and fracture, because of its cleavage angle #minerals
Reposted by Geological Outreach
332 of #365Minerals 🧪⚒️
Glaucophane:
- An amphibole group mineral
- Forms in the blueschist metamorphic facies (low temperature, high pressure)
- Its name comes from the Greek words "γλαυκός/glaukos" (sky blue) and "φαίνεσθαι/phainestai" (to appear) because of its colour #minerals
Glaucophane:
- An amphibole group mineral
- Forms in the blueschist metamorphic facies (low temperature, high pressure)
- Its name comes from the Greek words "γλαυκός/glaukos" (sky blue) and "φαίνεσθαι/phainestai" (to appear) because of its colour #minerals
November 28, 2025 at 10:55 AM
332 of #365Minerals 🧪⚒️
Glaucophane:
- An amphibole group mineral
- Forms in the blueschist metamorphic facies (low temperature, high pressure)
- Its name comes from the Greek words "γλαυκός/glaukos" (sky blue) and "φαίνεσθαι/phainestai" (to appear) because of its colour #minerals
Glaucophane:
- An amphibole group mineral
- Forms in the blueschist metamorphic facies (low temperature, high pressure)
- Its name comes from the Greek words "γλαυκός/glaukos" (sky blue) and "φαίνεσθαι/phainestai" (to appear) because of its colour #minerals
Reposted by Geological Outreach
326 of #365Minerals 🧪⚒️
Periclase:
- A magnesium oxide mineral
- Forms via high temperature contact metamorphism
- Used in the production of fire bricks
- Its name comes from the Greek word "περικλάω/perikláo" (to break around) because of its cleavage #minerals
Periclase:
- A magnesium oxide mineral
- Forms via high temperature contact metamorphism
- Used in the production of fire bricks
- Its name comes from the Greek word "περικλάω/perikláo" (to break around) because of its cleavage #minerals
November 22, 2025 at 10:42 AM
326 of #365Minerals 🧪⚒️
Periclase:
- A magnesium oxide mineral
- Forms via high temperature contact metamorphism
- Used in the production of fire bricks
- Its name comes from the Greek word "περικλάω/perikláo" (to break around) because of its cleavage #minerals
Periclase:
- A magnesium oxide mineral
- Forms via high temperature contact metamorphism
- Used in the production of fire bricks
- Its name comes from the Greek word "περικλάω/perikláo" (to break around) because of its cleavage #minerals
That should have been 9 November, not 11 November, of course...
November 9, 2025 at 3:55 PM
That should have been 9 November, not 11 November, of course...
D'oh! Not sure how I made that error. Perhaps influenced by the memorial service this morning.
November 9, 2025 at 3:50 PM
D'oh! Not sure how I made that error. Perhaps influenced by the memorial service this morning.