Crystals & Stones

Natural chalcedony specimen; photo by Teravolt, CC BY 3.0 — Roosters Peacock crystal guide
Chalcedony: The Stone of Balance, Communication & Quiet Strength
Chalcedony is a microcrystalline silica material composed mainly of quartz with variable moganite and includes familiar varieties such as Agate, Onyx, Carnelian, Chrysoprase and Bloodstone. Explore its mineral science, ancient... Read more...
Cerussite crystal specimen; CC0 via Wikimedia Commons — Roosters Peacock crystal guide
Cerussite: The Stone of Adaptability, Focus & Careful Transformation
Cerussite is lead carbonate, PbCO3, an unusually dense orthorhombic mineral known for brilliant luster and complex twinning; because it contains lead, specimens require careful handling. Explore its mineral science, alteration... Read more...
Celestine crystal specimen from Madagascar; photo by Didier Descouens, CC BY-SA 4.0 — Roosters Peacock crystal guide
Celestite (Celestine): The Stone of Peace, Reflection & Open Perspective
Celestite, properly Celestine, is strontium sulfate, SrSO4, an orthorhombic Baryte-group mineral known for pale blue crystals and a Mohs hardness of 3–3.5. Explore its mineral science, name history, modern symbolic... Read more...
Natural carnelian specimen from New Jersey — Roosters Peacock crystal guide
Carnelian: The Stone of Courage, Creativity & Forward Motion
Carnelian is an orange-to-red variety of chalcedony colored by iron-bearing compounds and iron oxides, with a long history in beads, seals and carved stones. Explore its mineral science, treatment notes,... Read more...
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...