Crystals & Stones

Dumortierite specimen from California; photo by Leon Hupperichs, CC BY-SA 3.0 — Roosters Peacock crystal guide
Dumortierite: The Stone of Discipline, Clarity & Inner Strength
Dumortierite is an aluminum borosilicate mineral in the orthorhombic system, commonly blue to violet-blue and relatively hard at Mohs 7–8. Explore its mineral science, 1881 naming history, modern symbolic associations... Read more...
Dravite tourmaline crystal from Brazil; public-domain photo by Géry Parent — Roosters Peacock crystal guide
Dravite: The Stone of Grounding, Endurance & Steady Confidence
Dravite is the magnesium-rich brown member of the Tourmaline Group, a trigonal borosilicate mineral with Mohs hardness about 7. Explore its mineral science, Drave River name origin, modern symbolic associations... Read more...
Descloizite crystal specimen from Berg Aukas, Namibia — Roosters Peacock crystal guide
Descloizite: The Stone of Focus, Responsibility & Grounded Determination
Descloizite is lead zinc vanadate hydroxide, PbZn(VO4)(OH), a dense orthorhombic secondary mineral of oxidized ore deposits; because it contains lead and vanadium, careful handling is important. Explore its mineral science,... Read more...
Dawsonite crystal specimen from Mont Saint-Hilaire, Québec — Roosters Peacock crystal guide
Dawsonite: The Stone of Clarity, Order & Practical Adaptability
Dawsonite is sodium aluminum carbonate hydroxide, NaAlCO3(OH)2, a soft orthorhombic mineral that commonly forms bladed, fibrous, acicular or rosette-like aggregates. Explore its mineral science, Montréal type-locality history, modern symbolic associations... Read more...
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...