3.3" Orange Stilbite, Clinozoisite and Calcite Association - Poland

Stilbite is a tectosilicate mineral of the zeolite group that is commonly found in zeolite deposits. Crystals often form flowery bowtie or hourglass-shaped structures and come in a variety of colors. Some of the most beautiful colorations are the pink or peach tints.

Clinozoisite is a aluminum calcium sorosilicate with the complex chemical formula {Ca2}{Al3}(Si2O7)(SiO4)O(OH). It is a member of the epidote group and is often found exhibiting colorless, yellow, yellow-green, green, or pink coloration. It also goes by the name of "aluminum epidote" and is found in locations of metamorphism and calcium-bearing sedimentary rocks.

About Calcite Crystals

Calcite crystals are a form of calcium carbonate (CaCO₃) known for their diverse shapes, transparency, and vibrant range of colors. They typically form in rhombohedral, scalenohedral, or prismatic shapes, often with well-defined, sharp edges and glossy surfaces. Calcite crystals are often translucent or transparent, sometimes displaying a double refraction effect where objects viewed through the crystal appear doubled. They can appear in various colors—white, clear, yellow, pink, blue, green, and orange—depending on impurities or trace minerals.

A notable characteristic of calcite is its reaction with weak acids like vinegar, which causes it to effervesce, or fizz, as it releases carbon dioxide. This property makes calcite crystals a key tool in geological identification and studies. Calcite forms in many environments, from sedimentary rocks like limestone and marble to hydrothermal veins.