Best Card Co 10 Mini Blank Bulk Notecards Polished Geode M1547BN | Semi-Precious Gemstone Design All Occasion Bulk Greeting Cards w/ Envelopes Gift for Rock Collectors

Add a slice of natural beauty to your written note of personal news with these blank notecards featuring a close-up look at polished slices of geodes and other natural rocks. Geodes are geological secondary structures which occur in certain sedimentary and volcanic rocks, according to Wikipedia. They are of sedimentary origin formed by chemical precipitation. Geodes are essentially hollow, vaguely rounded masses of mineral matter that form via either of two processes: by minerals of hydrothermal fluids filling gas bubbles in volcanic to sub-volcanic rocks, or by sedimentary nodules or concretions (that were deposited syngenetically within the rock formations in which they are found) dissolving and becoming partially filled by the same or other minerals precipitated from diagenetic water, groundwater or hydrothermal fluids. Geodes commonly have a chalcedony (cryptocrystalline quartz) shell lined internally by various minerals, often as crystals, particularly calcite, pyrite, kaolinite, sphalerite, millerite, barite, celestite, dolomite, limonite, smithsonite, opal, chalcedony and macrocrystalline quartz. Geodes are found mostly in basaltic lavas and limestones. The Warsaw Formation in the Keokuk region near the area where Missouri, Iowa, and Illinois join contains abundant geodes. These delightful note cards don't compromise on any of the attention to detail and production quality our company has been known for over the past 35 years. Each series packs in 10 fabulous, theme-related designs intended to deliver a big bang for your buck. Available blank or with a greeting, these versatile note card sets are a great and easy way to correspond ... and look great framed, too! Try framing them individually, or grouping several in a collage frame, to create visually appealing wall decor.