Specification Brand : EISCO BulletPoint1 : Pumice sample approximately 1" (3cm) in size BulletPoint2 : Ideal for demonstrating the effect of vesicles on rock density - pumice will float in water due to internal air pockets BulletPoint3 : Perfect size for use in classroom identification labs and exercises, correlates well to Next Generation Science Standards Evidence Statements BulletPoint4 : Glassy texture is the result of swift cooling in mid-air BulletPoint5 : Specimen comes in clear labeled and barcoded bag for ideal storage ItemName : EISCO Pumice Specimen (Igneous Rock), Approx. 1" (3cm) ItemPackageDimensions_Height : 1.524 centimeters ItemPackageDimensions_Length : 2.54 centimeters ItemPackageDimensions_Width : 2.286 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : science-classroom-specimens Manufacturer : Eisco Material : Plastic NumberOfItems : 1 PartNumber : ESNG0048 ProductDescription : Pumice is a familiar igneous rock useful in rock identification exercises. Formed quickly during explosive volcanic eruptions, this rock formed around pockets of air within the lava. The air pockets within this sample make it surprisingly light. Many pumice samples can float in water, a diagnostic feature for identifying this rock. This sample is also available in packs of 12. ProductSiteLaunchDate : 2016-07-26T15:26:41.813Z Size : 1 Pack Style : Classic SupplierDeclaredDgHzRegulation1 : not_applicable SupplierDeclaredDgHzRegulation2 : not_applicable SupplierDeclaredDgHzRegulation3 : not_applicable SupplierDeclaredDgHzRegulation4 : not_applicable SupplierDeclaredDgHzRegulation5 : not_applicable