Crystals & Stones

Fuchsite specimen; photo by Shannon Heinle, CC0 — Roosters Peacock crystal guide
Fuchsite: The Stone of Renewal, Heart Wisdom & Healthy Boundaries
Fuchsite is the chromium-bearing green variety of Muscovite mica, a soft monoclinic mineral with perfect basal cleavage that can split into thin elastic sheets. Explore its mineral science, name history,... Read more...
Green fluorite crystal on micaceous matrix from Namibia; photo by CarlesMillan, CC BY-SA 3.0 — Roosters Peacock crystal guide
Fluorite: The Stone of Focus, Order & Clear Thinking
Fluorite is calcium fluoride, CaF2, an isometric mineral famous for cubic and octahedral crystals, perfect octahedral cleavage, Mohs hardness 4 and a wide range of colors. Explore its mineral science,... Read more...
Fire opal specimen; photo by Shannon Heinle, CC0 — Roosters Peacock crystal guide
Fire Opal: The Stone of Passion, Creativity & Radiant Confidence
Fire Opal is a transparent-to-translucent Opal variety, hydrated amorphous silica SiO2·nH2O, known for yellow-to-orange-to-red body color and not necessarily for play-of-color. Explore its mineral science, Mexican gem history, modern symbolic... Read more...
Natural fire agate rough specimen from New Mexico; photo by Malinadams, CC BY-SA 3.0 — Roosters Peacock crystal guide
Fire Agate: The Stone of Vitality, Courage & Creative Spark
Fire Agate is an iridescent chalcedony variety, primarily SiO2, whose warm flashes are produced by extremely thin iron-rich layers and thin-film interference within the stone. Explore its mineral science, optical-effect... Read more...
Orthoclase feldspar specimen from Brazil; photo by Géry Parent, public domain — representative of the Feldspar Group, Roosters Peacock crystal guide
Feldspar: The Stone of Adaptability, Foundation & Everyday Strength
Feldspar is a major mineral group of aluminum-bearing framework silicates that makes up a large portion of Earth's crust and includes members such as Albite, Anorthite, Orthoclase and Microcline. Explore... Read more...
Euxenite-(Y) mineral specimen — Roosters Peacock crystal guide
Euxenite-(Y): The Stone of Grounded Awareness, Complexity & Responsible Focus
Euxenite-(Y) is a dense, complex yttrium-bearing niobate-titanate that can contain uranium and thorium and may become metamict from natural radiation damage; treat specimens as collector displays rather than carry stones.... Read more...
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...