Specification Brand : Generic BulletPoint : Gemshow7 BulletPoint1 : You will receive exactly this Willemite Calcite Rough - 100mm x 92mm x 80mm / 3 15/16 x 3 5/8 x 3 3/16 Inches; 1060g / 37.4 oz / 2.3 lb (see photos, some photos are taken wet, the photos are taken under bright light, stand not included)! NOTE: THE PHOTOS UNDER SW UV LIGHT WERE TAKEN WITH USING POWERFUL 6 WATT 254nm LAMP WITH UV FILTER! The photo under LW UV 365nm - with Optical Filter! BulletPoint2 : Willemite is a zinc silicate mineral and a minor ore of zinc. It is highly fluorescent (green) under shortwave ultraviolet light (254nm). It occurs in all different colors in daylight, in fibrous masses, solid brown masses (troostite), and apple-green gemmy masses. BulletPoint3 : Willemite's great desirability is not so much its use as a zinc ore, its rarity, its associations or even its crystal habits as it is its wonderful fluorescence. Nearly all willemite specimens fluoresce a bright green under ultra-violet light. This fluorescence combined with the red fluorescence of the calcite! And blue fluorescence of the fluorite! BulletPoint4 : Willemite was named in honor of King William I of the Netherlands (1772 - 1843), who was known locally as King Willem. Chemical Formula: Zn2SiO4, Zinc Silicate. Hardness is 5.5 Color: Brown, reddish-brown, green, white, and gray. Less commonly yellow, orange, blue, colorless, or multicolored green and brown. BulletPoint5 : (The above information is provided solely for informational purpose. Kindly note that all stones are offered for decorative purposes only. Please, handle your stones with great care, do not grind or crumble them, do not dip or add them into your food or drink, do not use any parts of them in any elixirs, potions, lotions etc. Always make sure you wash your hands before and after working with your crystals.) Color : Silver Department : womens ExternallyAssignedProductIdentifier1 : 0761017592451 ExternallyAssignedProductIdentifier2 : 761017592451 GemType : No Gemstone IncludedComponents : stone ItemName : Two Aragonite Multi Crystal Cluster Specimen Gemstone Gem Stone ASA2/92724 ItemPackageQuantity : 1 ItemTypeKeyword : science-classroom-specimens Manufacturer : gemshow7 Material : Silver MetalType : No Metal Type ModelName : TC326 ModelNumber : 88777450927241 NumberOfItems : 1 PartNumber : Morocco Two Aragonite Multi 3d92cbf8 ProductDescription : Two Aragonite Multi Crystal Cluster Specimen Gemstone Gem Stone ASA2/92724 ProductSiteLaunchDate : 2019-12-06T08:00:00.000Z Size : Standard SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 TargetGender : female UnitCount : 1 UnspscCode : 54120000 WarrantyDescription : A