Wonderful pair of onyx egg shaped and cube calcite crystal cluster on custom stand. Onyx is a type of chalcedony, which is itself a form of microcrystalline quartz. Onyxes have straight, nearly parallel bands or layers of color, which allow skilled gem carvers to cut away material to create cameos and intaglios with extraordinary depth and contrast. Onyx typically has a black base with white or colored bands. The colored bands can range from shades of brown, red, orange, yellow, green, blue, and purple. A calcite cube refers to a naturally formed or artificially shaped crystal of calcite that exhibits a cubic form. Calcite typically crystallizes in the trigonal crystal system, forming rhombohedral or scalenohedral crystals. However, under certain conditions, calcite can form cubic crystals. These cubic crystals are relatively rare compared to other forms of calcite. Calcite cubes are characterized by their geometric shape, resembling a cube with six square faces. The edges and corners of the cube are often well-defined, creating a symmetrical and aesthetically pleasing crystal. The formation of calcite cubes can be influenced by factors such as temperature, pressure, and chemical composition of the surrounding environment. Cubic calcite crystals are typically found in areas where there is enough space for crystal growth without interference from other minerals. Calcite cubes are fascinating examples of the diversity of crystal forms that minerals can take, showcasing the natural beauty and symmetry inherent in crystalline structures. APPROXIMATE DIMENSION including stand - Egg shape: Height: 23.2 cm, Diameter: 9 cm - Cluster Height: 21.5 cm, Width: 11.5 cm DISCLAIMERS: - Please be aware these pictures have been taken in a dark studio; colors may vary depending on the environment. - THE WEIGHT MENTIONED IS INCLUDE PACKING MATERIAL. THE SHIPPING - The item will be sent with a Track & Trace code via DHL Parcel, DPD or postNl. The tracking will be updated in your Catawiki lot once your parcel has been dropped off. - Please check regularly to avoid your parcel being returned to us, in which case the buyer will be responsible for the shipping costs of the 2nd shipment. - For tracking to Spain and Portugal please use this link and add the tracking number from your Catawiki lot https://clientesparcel.dhl.es/LiveTracking/Home - WE DO NOT COMBINE SHIPPING!!! - If you have any questions about your parcel please contact us using the Catawiki message service. We will try to reply within 3 working days.