Crystals & Stones

Calcite crystal specimen — Roosters Peacock crystal guide
Calcite: The Stone of Clarity, Renewal & Flexible Perspective
Calcite is calcium carbonate, CaCO3, a trigonal mineral with Mohs hardness 3, perfect rhombohedral cleavage and strong double refraction in clear crystals. Explore its mineral science, long practical history, modern... Read more...
Bronzite orthopyroxene specimen — Roosters Peacock crystal guide
Bronzite: The Stone of Grounding, Composure & Practical Confidence
Bronzite is an iron-bearing variety of Enstatite, an orthopyroxene recognized by its bronze-like submetallic sheen and earthy brown color. Explore its mineral science, name origin, occurrence in terrestrial rocks and... Read more...
Botswana Agate specimen; photo by James St. John, CC BY 2.0 — Roosters Peacock crystal guide
Botswana Agate: The Stone of Stability, Patience & Quiet Strength
Botswana Agate is a geographic variety of banded chalcedony from Botswana, prized for fine parallel bands in soft gray, pink, white, brown and cream tones. Explore its mineral science, locality... Read more...
Blue topaz crystal specimen — Roosters Peacock crystal guide
Blue Topaz: The Stone of Clear Expression, Confidence & Open Perspective
Blue Topaz is an orthorhombic aluminum silicate fluoride/hydroxide with Mohs hardness 8 and perfect cleavage; most vivid blue material in the modern market is produced by irradiation followed by heat... Read more...
Blue sapphire crystal specimen — Roosters Peacock crystal guide
Blue Sapphire: The Stone of Wisdom, Integrity & Clear Commitment
Blue Sapphire is gem-quality corundum, Al2O3, colored chiefly by trace-element interactions involving iron and titanium and prized for its Mohs hardness of 9. Explore its mineral science, treatment notes, historic... Read more...
Blue Lace Agate specimen — Roosters Peacock crystal guide
Blue Lace Agate: The Stone of Calm Communication & Gentle Clarity
Blue Lace Agate is a blue-and-white banded chalcedony variety composed primarily of silica, SiO2, with classic material known from southern Namibia. Explore its mineral science, variety history, modern symbolic associations... Read more...
Blue kyanite blades — Roosters Peacock crystal guide
Blue Kyanite: The Stone of Alignment, Communication & Clear Direction
Blue Kyanite is an aluminum silicate, Al2SiO5, known for bladed triclinic crystals and unusual direction-dependent hardness. Explore its mineral science, role in metamorphic geology, modern symbolic associations with alignment, communication... Read more...
Blue calcite specimen; photo by Stephanie Clifford, CC BY 2.0 — Roosters Peacock crystal guide
Blue Calcite: The Stone of Calm, Reflection & Gentle Communication
Blue Calcite is a blue variety of calcium carbonate, CaCO3, known for Mohs hardness 3, perfect rhombohedral cleavage and sensitivity to acids. Explore its mineral science, name history, modern symbolic... Read more...
Bloodstone (heliotrope) specimen — Roosters Peacock crystal guide
Bloodstone: The Stone of Courage, Endurance & Grounded Vitality
Bloodstone, also called Heliotrope, is a dark green chalcedony or jasper material marked with red iron-oxide spots and traditionally recognized as a March birthstone. Explore its mineral science, ancient sun... Read more...
Black tourmaline (schorl) specimen — Roosters Peacock crystal guide
Black Tourmaline: The Stone of Grounding, Protection & Strong Boundaries
Black Tourmaline is most commonly Schorl, the iron-rich black member of the tourmaline group, recognized by its deeply striated prismatic crystals and Mohs hardness around 7. Explore its mineral science,... Read more...
Black spinel specimen from Sri Lanka; photo by Osama Shukir Muhammed Amin, CC BY-SA 4.0 — Roosters Peacock crystal guide
Black Spinel: The Stone of Strength, Resilience & Clear Boundaries
Black Spinel is a dark variety of magnesium aluminum oxide, MgAl2O4, known for durable isometric crystals and a Mohs hardness around 7.5–8. Explore its mineral science, gem history, modern symbolic... Read more...
Natural black onyx specimen; Wikimedia Commons, CC BY-SA 4.0 — Roosters Peacock crystal guide
Black Onyx: The Stone of Strength, Boundaries & Steady Focus
Black Onyx is a chalcedony material associated with true parallel-banded onyx, while much uniformly black commercial material is dyed or color-enhanced chalcedony. Explore its mineral science, historic use in seals... Read more...