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This Specimen has been sold.
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2.6" Stilbite, Quartz, Clinozoisite and Calcite Association - Poland
This is a beautiful, 2.6" wide stilbite, quartz, clinozoisite and calcite association that was collected from Strzegom, Poland. The stilbite is orange-brown in color and formed from a quartz, clinozoisite and calcite crystal encrusted matrix.
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.
About Quartz
Quartz is the name given to silicon dioxide (SiO2) and is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich environments--usually igneous rocks or hydrothermal environments like geothermal waters--at temperatures between 100°C and 450°C, and usually under very high pressure. In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when water freezes. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.
Quartz is the name given to silicon dioxide (SiO2) and is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich environments--usually igneous rocks or hydrothermal environments like geothermal waters--at temperatures between 100°C and 450°C, and usually under very high pressure. In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when water freezes. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.
About Clinozoisite
Clinozoisite is a member of the epidote group that forms in metamorphic rocks altered by heat and pressure. It is typically pale green, gray, yellowish, or nearly colorless, with a glassy to pearly luster. The mineral commonly occurs as prismatic crystals or granular masses within rocks like schist and gneiss.
Composed mainly of calcium, aluminum, and silicate, clinozoisite is closely related to epidote but contains less iron, giving it a lighter color. While primarily valued by collectors, transparent green varieties are sometimes cut as gemstones.
Clinozoisite is a member of the epidote group that forms in metamorphic rocks altered by heat and pressure. It is typically pale green, gray, yellowish, or nearly colorless, with a glassy to pearly luster. The mineral commonly occurs as prismatic crystals or granular masses within rocks like schist and gneiss.
Composed mainly of calcium, aluminum, and silicate, clinozoisite is closely related to epidote but contains less iron, giving it a lighter color. While primarily valued by collectors, transparent green varieties are sometimes cut as gemstones.
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.
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.
SPECIES
Stilbite, Quartz, Clinozoisite & Calcite
LOCATION
Strzegom, Strzegom-Sobótka Massif, Poland
SIZE
2.6" wide
CATEGORY
ITEM
#148420
