Crystals & Stones

Eucryptite specimen from Finland; photo by Jyrki Autio, public domain — Roosters Peacock crystal guide
Eucryptite: The Stone of Hidden Strength, Simplicity & Quiet Focus
Eucryptite is lithium aluminum silicate, LiAlSiO4, a trigonal Phenakite-group mineral commonly found in lithium-rich pegmatites and often difficult to distinguish visually from pale Quartz or feldspar. Explore its mineral science,... Read more...
Eosphorite with rose quartz and zanazziite from Brazil; photo by Géry Parent, public domain — Roosters Peacock crystal guide
Eosphorite: The Stone of Dawn, Hope & Steady Growth
Eosphorite is a hydrated manganese aluminum phosphate, Mn2+Al(PO4)(OH)2·H2O, known for golden-brown to pink orthorhombic crystals and radiating groups. Explore its mineral science, 'dawn-bearing' name origin, modern symbolic associations with hope,... Read more...
Ekanite specimen; photo by Geni, CC BY-SA 4.0 — Roosters Peacock crystal guide
Ekanite: The Stone of Discernment, Boundaries & Responsible Awareness
Ekanite is a calcium thorium silicate, Ca2ThSi8O20, whose thorium content makes it a radioactive collector mineral that should be treated as display-only and never ground or used in elixirs. Explore... Read more...
Eudialyte-group crystals from Wind Mountain, New Mexico; photo by Jerry Cone, public domain — Roosters Peacock crystal guide
Eudialyte: The Stone of Vitality, Integration & Grounded Purpose
Eudialyte is a chemically complex sodium-calcium-zirconium silicate of the trigonal Eudialyte Group, commonly appearing in red, pink and reddish-brown tones within unusual alkaline igneous rocks. Explore its mineral science, major... Read more...
Euclase crystal specimen; photo by Robert M. Lavinsky, CC BY-SA 3.0 — Roosters Peacock crystal guide
Euclase: The Stone of Clarity, Discernment & Decisive Focus
Euclase is beryllium aluminum silicate hydroxide, BeAlSiO4(OH), a monoclinic mineral with Mohs hardness about 7.5 but perfect cleavage and brittle behavior. Explore its mineral science, name origin, modern symbolic associations... Read more...
Ettringite specimen from N'Chwaning Mines, South Africa; photo by Didier Descouens, CC BY-SA 3.0 — Roosters Peacock crystal guide
Ettringite: The Stone of Structure, Patience & Clear Formation
Ettringite is a highly hydrated calcium aluminum sulfate mineral in the trigonal system, typically forming delicate prismatic or fibrous crystals and also occurring as a cement-hydration product. Explore its mineral... Read more...
Rough Welo Ethiopian opal; photo by Dpulitzer, CC BY-SA 4.0 — Roosters Peacock crystal guide
Ethiopian Opal: The Stone of Creativity, Reflection & Shifting Perspective
Ethiopian Opal is hydrous amorphous silica, SiO2·nH2O, and much Welo material is hydrophane, meaning it can absorb water and temporarily change appearance. Explore its mineral science, modern Ethiopian source history,... Read more...
Erythrite specimen; photo by Lloyd.james0615 — Roosters Peacock crystal guide
Erythrite: The Stone of Awareness, Boundaries & Careful Transformation
Erythrite is a very soft hydrated cobalt arsenate, Co3(AsO4)2·8H2O, known for vivid pink-to-magenta 'cobalt bloom' in oxidized cobalt deposits; because it contains arsenic, careful handling is important. Explore its mineral... Read more...
Epidote crystal specimen from Pakistan — Roosters Peacock crystal guide
Epidote: The Stone of Growth, Perspective & Purposeful Change
Epidote is a calcium-aluminum-iron silicate hydroxide mineral in the monoclinic system, commonly recognized by pistachio-green to dark-green crystals in metamorphic and hydrothermal settings. Explore its mineral science, name history, modern... Read more...
Enstatite crystal from Tanzania; photo by John Sobolewski, CC BY 3.0 — Roosters Peacock crystal guide
Enstatite: The Stone of Endurance, Balance & Quiet Strength
Enstatite is a magnesium silicate orthopyroxene, commonly written MgSiO3, found in igneous and metamorphic rocks as well as meteorites. Explore its mineral science, name history, modern symbolic associations with endurance,... Read more...
Natural emerald crystal from Colombia — Roosters Peacock crystal guide
Emerald: The Stone of Growth, Devotion & Heart-Centered Wisdom
Emerald is the vivid green gem variety of Beryl, Be3Al2Si6O18, colored chiefly by chromium and/or vanadium and recognized as May’s birthstone. Explore its mineral science, common fracture-filling treatments, ancient gem... Read more...
Elestial-style skeletal quartz specimen from Brazil — Roosters Peacock crystal guide
Elestial Quartz: The Stone of Reflection, Integration & Layered Insight
Elestial Quartz is a trade name for Quartz, SiO2, with complex skeletal, stepped or layered crystal growth rather than a separate mineral species. Explore its mineral science, trade-name caveats, modern... Read more...