Crystals & Stones

Dolomite crystal specimen from Germany; photo by Leon Hupperichs — Roosters Peacock crystal guide
Dolomite: The Stone of Stability, Balance & Gentle Grounding
Dolomite is calcium magnesium carbonate, CaMg(CO3)2, a trigonal rock-forming mineral commonly seen in white, gray, pink and brownish rhombohedral crystals. Explore its mineral science, name history, modern symbolic associations with... Read more...
Dioptase crystal specimen from the Republic of the Congo — Roosters Peacock crystal guide
Dioptase: The Stone of Emotional Honesty, Renewal & Deep Perspective
Dioptase is a vivid green hydrated copper silicate, CuSiO3·H2O, with Mohs hardness about 5 and a much softer, more fragile structure than Emerald despite the similar color. Explore its mineral... Read more...
Diopside crystal specimen from Afghanistan — Roosters Peacock crystal guide
Diopside: The Stone of Renewal, Balance & Practical Growth
Diopside is calcium magnesium silicate, CaMgSi2O6, a monoclinic pyroxene found in metamorphic, skarn and ultramafic rocks; chromium-rich green material is known as Chrome Diopside. Explore its mineral science, name history,... Read more...
Diaspore crystal specimen — Roosters Peacock crystal guide
Diaspore: The Stone of Adaptability, Perspective & Resilient Change
Diaspore is aluminum oxyhydroxide, AlO(OH), an orthorhombic mineral with Mohs hardness about 6.5–7; some Turkish gem material shows a noticeable color change under different lighting. Explore its mineral science, name... Read more...
Rough diamond crystal; photo by Tõnu Pani, CC BY 4.0 — Roosters Peacock crystal guide
Diamond: The Stone of Endurance, Clarity & Lasting Commitment
Diamond is crystalline carbon, C, an isometric mineral ranked 10 on the Mohs scale and formed naturally at great depth in Earth's mantle; laboratory-grown material has the same basic composition... Read more...
Gypsum desert rose specimen; photo by Stephanie Clifford, CC BY 2.0 — Roosters Peacock crystal guide
Desert Rose: The Stone of Grounding, Patience & Gentle Renewal
Desert Rose is a rosette-shaped mineral aggregate commonly formed from Gypsum with trapped sand, though some Desert Roses are Baryte rather than Gypsum. Explore its mineral science, formation in arid... Read more...
Dendritic agate specimen from Brazil; photo by Mauro Cateb, CC BY-SA 4.0 — Roosters Peacock crystal guide
Dendritic Agate: The Stone of Growth, Patience & Natural Perspective
Dendritic Agate is chalcedony, primarily SiO2, containing branching manganese- and/or iron-oxide dendrites that resemble trees, ferns or landscapes but are not fossil plants. Explore its mineral science, pattern formation, modern... Read more...
Demantoid garnets from California; photo by James St. John, CC BY 2.0 — Roosters Peacock crystal guide
Demantoid Garnet: The Stone of Vitality, Confidence & Bright Renewal
Demantoid is the green gem variety of Andradite Garnet, prized for exceptional brilliance and dispersion and historically associated with 19th-century Russian discoveries. Explore its mineral science, horsetail-inclusion caveats, modern symbolic... Read more...
Datolite crystal specimen — Roosters Peacock crystal guide
Datolite: The Stone of Learning, Order & Practical Insight
Datolite is a monoclinic calcium borosilicate hydroxide, CaB(SiO4)(OH), found in several hydrothermal, volcanic and metamorphic settings and known in crystals or botryoidal masses. Explore its mineral science, 1806 name history,... Read more...
Danburite crystal cluster from Charcas, Mexico — Roosters Peacock crystal guide
Danburite: The Stone of Clarity, Perspective & Light-Focused Intention
Danburite is calcium borosilicate, CaB2Si2O8, an orthorhombic mineral that commonly forms transparent to pale prismatic crystals with Mohs hardness about 7–7.5. Explore its mineral science, Danbury name origin, modern symbolic... Read more...
Covellite specimen from Butte, Montana; photo by Didier Descouens, CC BY 3.0 — Roosters Peacock crystal guide
Covellite: The Stone of Insight, Transformation & Deep Reflection
Covellite is copper sulfide, CuS, a very soft hexagonal mineral known for indigo-blue to blue-black metallic color and vivid iridescent reflections. Explore its mineral science, name history, modern symbolic associations... Read more...
Native copper mineral specimen; CC0 via Wikimedia Commons — Roosters Peacock crystal guide
Copper: The Stone of Conductivity, Vitality & Practical Connection
Native Copper is elemental Cu, an isometric, highly conductive and malleable mineral with a copper-red metallic surface that can tarnish dark or green. Explore its mineral science, ancient metalworking history,... Read more...