{"product_id":"vivianite-crystal-cluster-in-matrix-sao-gabriel-da-cachoeira-brazil-0-59-lbs","title":"Vivianite Crystal Cluster in Matrix – São Gabriel da Cachoeira, Brazil – 0.59 lbs","description":"\u003cp\u003e\u003cspan\u003eA dramatic \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eVivianite crystal specimen from the São Gabriel da Cachoeira area of Amazonas, Brazil\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, featuring elongated blue-green crystals emerging from a richly textured iron-bearing matrix. Its tall architectural profile and intense color make this an exceptional display specimen from one of Brazil’s best-known vivianite-producing regions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe formation is dominated by a substantial intergrown crystal group rising diagonally across the matrix. Broad bladed faces, strong lengthwise striations, stepped growth features, and glassy reflections give the crystals remarkable visual depth. In ordinary lighting they appear nearly black, navy blue, or forest green; under focused illumination, translucent sections reveal vivid emerald, teal, and electric blue-green color.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSmaller vivianite crystals and partial blades continue across the lower matrix and along both sides of the primary formation. Portions remain partly embedded, preserving the relationship between the crystals and their original growth environment. The contrasting matrix ranges from dark brown and charcoal to ochre and rusty orange, with earthy coatings, recessed pockets, and rounded iron-rich surface textures.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe reverse is predominantly natural matrix, displaying an intricate granular-to-botryoidal surface in brown, mustard, and orange tones. This heavily mineralized host creates a striking backdrop for the highly reflective vivianite.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMeasuring approximately 3 × 1.5 × 5.5 inches and weighing 0.59 pounds, this tall specimen combines substantial crystal size, saturated color, brilliant luster, and strong natural contrast.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eMineral: Vivianite\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFormation: Large intergrown bladed vivianite crystals in natural iron-rich matrix\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLocality: São Gabriel da Cachoeira area, Amazonas, Brazil\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWeight: 0.59 lbs, approximately 268 grams\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDimensions: Approximately 3 × 1.5 × 5.5 inches\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eColor: Deep blue-green, emerald green, teal, navy blue, blue-black, rusty brown, ochre, and orange\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCrystal Habit: Elongated prismatic-to-bladed crystals with parallel growth and pronounced longitudinal striations\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLuster: Vitreous to highly reflective\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTransparency: Translucent along thinner crystal sections and edges; otherwise dark and nearly opaque\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMatrix: Earthy brown-to-ochre iron-rich material with granular, recessed, and rounded surface textures\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eChemical Formula: Fe₃(PO₄)₂·8H₂O\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMineral Class: Hydrated iron phosphate\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCrystal System: Monoclinic\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMohs Hardness: Approximately 1.5–2\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDisplay Size: Tall cabinet specimen\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCondition: Natural mineral specimen with inherent crystal contacts, cleavage features, incomplete or contacted terminations, surface deposits, matrix attachment, edge irregularities, and color variation associated with natural growth and extraction\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExact specimen shown\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAbout Vivianite\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eVivianite is a hydrated iron-phosphate mineral valued for its intense blue-to-green coloration and highly reflective bladed crystals. Fresh material may initially be pale or nearly colorless, but exposure to oxygen and light can gradually deepen its color through natural oxidation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBecause vivianite is soft, cleavage-prone, and light-sensitive, display this specimen away from direct sunlight and strong ultraviolet exposure. Handle it by the solid matrix, avoid water and chemical cleaners, and remove dust only with gentle air or an exceptionally soft, dry brush.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCollector Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eLarge Brazilian vivianite crystal group\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDeep blue-green color with vivid emerald illumination\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBroad, reflective bladed faces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStrong longitudinal striations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMultiple intergrown and partially exposed crystals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDramatic contrast against rusty iron-rich matrix\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTall 5.5-inch architectural profile\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNatural matrix preserved across the reverse\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExact specimen pictured\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003eProfessionally packaged and shipped from Colorado.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eYou will receive the exact specimen shown.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThank you for supporting our family-owned small business.\u003c\/span\u003e\u003c\/p\u003e","brand":"Serenity Soul Stones","offers":[{"title":"Default Title","offer_id":50580848705786,"sku":null,"price":118.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/2328\/8826\/files\/20260924_105108.jpg?v=1790269623","url":"https:\/\/serenitysoulstones.com\/products\/vivianite-crystal-cluster-in-matrix-sao-gabriel-da-cachoeira-brazil-0-59-lbs","provider":"Serenity Soul Stones","version":"1.0","type":"link"}