Crystals & Stones

Glaucophane specimen from USGS mineral collection; public domain — Roosters Peacock crystal guide
Glaucophane: The Stone of Adaptation, Perspective & Quiet Strength
Glaucophane is a blue-to-lavender sodium amphibole characteristic of high-pressure, low-temperature blueschist metamorphism in subduction settings; intact specimens should be kept dust-free and never ground or sanded. Explore its mineral science,... Read more...
Gem silica, chalcedony over chrysocolla from Arizona; photo by Robert M. Lavinsky, CC BY-SA 3.0 — Roosters Peacock crystal guide
Gem Silica: The Stone of Clear Expression, Calm & Creative Insight
Gem Silica is a gem trade name for translucent blue-to-blue-green chalcedony colored by Chrysocolla rather than a separate mineral species. Explore its mineral science, trade-name and identification caveats, modern symbolic... Read more...
Gaspeite specimen from Western Australia; photo by Robert M. Lavinsky, CC BY-SA 3.0 — Roosters Peacock crystal guide
Gaspeite: The Stone of Growth, Discernment & Grounded Renewal
Gaspeite is nickel carbonate, NiCO3, a yellowish-green trigonal Calcite-group mineral found in nickel-rich deposits and sometimes used for cabochons and inlay; because it contains nickel, avoid creating dust. Explore its... Read more...
Galena mineral specimen; photo by GOKLuLe, CC BY-SA 3.0 — Roosters Peacock crystal guide
Galena: The Stone of Grounding, Structure & Honest Reflection
Galena is lead sulfide, PbS, a dense isometric mineral known for metallic lead-gray cubes, perfect cubic cleavage and its historic importance as the principal ore of lead; careful handling is... Read more...
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...