{"product_id":"large-vivianite-crystal-cluster-in-matrix-sao-gabriel-da-cachoeira-brazil-1-98-lbs","title":"Large Vivianite Crystal Cluster in Matrix – São Gabriel da Cachoeira, Brazil – 1.98 lbs","description":"\u003cp\u003e\u003cspan\u003eThis large cabinet-sized vivianite specimen from the São Gabriel da Cachoeira area of Brazil features multiple substantial crystals embedded throughout a richly textured, iron-bearing matrix. Weighing nearly two pounds and reaching approximately 7 inches, it has an imposing geological presence and offers dramatically different views from every angle.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSeveral elongated vivianite crystals emerge from deep cavities across the primary display face. Their broad bladed forms exhibit pronounced longitudinal striations, glassy reflective surfaces, and partially exposed terminations. While the crystals appear nearly black or midnight blue under ordinary lighting, focused illumination reveals saturated forest green, emerald, teal, and electric blue within their thinner edges and translucent sections.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe largest blades form a striking central concentration, while additional crystals appear in upper, side, and lower pockets. This distributed crystallization creates far greater visual complexity than a specimen centered around a single isolated crystal. Natural contacts, recessed growth areas, and partial crystals preserve the formation’s rugged character.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts surrounding matrix ranges from mustard yellow and ochre to rust brown, creating exceptional contrast with the dark blue-green vivianite. The reverse is primarily natural iron-rich matrix with granular textures, rounded cavities, and smaller mineralized pockets.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eMeasuring approximately 5 × 3 × 7 inches, this substantial specimen combines multiple large vivianite crystals, intense hidden coloration, bold matrix contrast, and impressive cabinet-scale presentation.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003ePrimary Mineral: Vivianite\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFormation: Multiple large bladed vivianite crystals embedded within iron-rich matrix cavities\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: 1.98 lbs, approximately 898 grams\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDimensions: Approximately 5 × 3 × 7 inches\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eColor: Midnight blue, near-black, forest green, emerald, teal, electric blue, ochre, mustard yellow, and rust brown\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCrystal Habit: Elongated bladed-to-prismatic crystals with broad reflective faces and longitudinal striations\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eDisplay Face: Several major vivianite crystals distributed among recessed matrix pockets\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eReverse: Predominantly natural ochre-brown matrix with cavities and granular iron-rich textures\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eLuster: Vitreous across exposed vivianite faces; earthy to subtly reflective across the matrix\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eTransparency: Translucent along thinner crystal sections and edges, appearing opaque in thicker areas\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: Large cabinet specimen\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eCondition: Natural mineral specimen with inherent crystal contacts, incomplete terminations, cleavage features, edge irregularities, internal fractures, inclusions, cavities, surface deposits, and extraction-related contacts\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eExact specimen shown\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eAbout Brazilian Vivianite\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eVivianite is a hydrated iron-phosphate mineral celebrated for its intense blue-green coloration and strongly reflective bladed crystals. Fresh or thinner material may appear green, while natural oxidation can progressively deepen the color toward blue-green, navy, and nearly black.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eBright directional lighting reveals the remarkable color concealed within this specimen’s darkest crystals. This lighting response is especially noticeable along thin edges, internal fractures, and more translucent crystal sections.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eVivianite is soft, cleavage-prone, and sensitive to prolonged light exposure. Display it away from direct sunlight and strong ultraviolet light. Handle the piece by its solid matrix, avoid water and chemical cleaners, and remove dust only with a soft dry brush or gentle air blower.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eCollector Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThis specimen features:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eNatural vivianite from the São Gabriel da Cachoeira area of Brazil\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLarge 1.98-pound cabinet size\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImpressive approximately 7-inch profile\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMultiple substantial bladed vivianite crystals\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBroad glassy and highly reflective crystal faces\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStrong longitudinal growth striations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDeep blue-green to nearly black surface coloration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eEmerald, teal, and electric-blue transmitted-light highlights\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCrystals distributed across several matrix cavities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOchre, mustard-yellow, and rust-brown iron-rich matrix\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDramatic mineral and color contrast\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHighly dimensional natural formation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDistinctive front, side, and reverse views\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":50581343174906,"sku":null,"price":396.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/2328\/8826\/files\/LargeVivianiteCrystalClusterinMatrix_SaoGabrieldaCachoeira_Brazil_1.98lbs_8.jpg?v=1790287434","url":"https:\/\/serenitysoulstones.com\/products\/large-vivianite-crystal-cluster-in-matrix-sao-gabriel-da-cachoeira-brazil-1-98-lbs","provider":"Serenity Soul Stones","version":"1.0","type":"link"}