Wonderful pair of Cube Calcite cluster and Onyx sphere on custom stands. Cube calcite crystals typically form in a rhombohedral shape, but they can also present as cubic or other geometric forms due to their perfect cleavage in three directions at 120 degrees. This cleavage allows calcite to break into shapes that appear cubic. Cube calcite is often transparent or translucent and can be colorless or display a variety of colors depending on impurities. Iceland spar, in particular, is known for its exceptional clarity and transparency. Cube calcite, especially in its clear form known as Iceland spar, is a fascinating mineral that continues to intrigue scientists, collectors, and enthusiasts with its unique properties and historical significance. Onyx is a type of gemstone that belongs to the crypto crystalline form of quartz. It typically forms in the cavities of igneous rocks, especially volcanic lava flows, where silica-rich fluids deposit layers of quartz over time. This process creates the characteristic banded appearance that onyx is known for, with alternating bands of different colors. While black and white banded onyx is the most common, it can also occur in shades of brown, red, green, or other colors. Onyx is characterized by its fine texture and glossy, polished surface. It has a smooth feel and often exhibits a high level of translucency when properly cut and polished. The bands in onyx can vary in thickness and arrangement, ranging from straight and uniform to irregular and wavy, depending on the specific conditions of formation. Approximate Dimensions including stand: # Cluster --> Height: 24.7 cm, Width: 8.3 cm Length: 11 cm # Sphere --> Height: 18.7 cm Diameter : 10.6 cm NOTE: - The sphere comes with a stand. - THE WEIGHT MENTIONED IS INCLUDING PACKING MATERIAL. THE SHIPMENT - 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.