{"product_id":"rainbow-optical-calcite-maharashtra-india-0-32-lbs","title":"Rainbow Optical Calcite – Maharashtra, India – 0.32 lbs","description":"\u003cp data-start=\"83\" data-end=\"418\" class=\"PDq2pG_selectionAnchorContainer\"\u003eAn extra-quality Rainbow Optical Calcite specimen from Maharashtra, India, featuring excellent transparency, strong internal optical effects, and vivid spectral flashes. Naturally self-standing, the specimen presents an architectural, crystal-like profile that displays beautifully without requiring the stand shown in the photographs.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"420\" data-end=\"887\"\u003eThe calcite ranges from nearly water-clear to softly translucent, with broad viewing windows revealing layered cleavage planes, internal veils, and reflective features throughout the specimen. When moved beneath direct light, selected internal fractures separate the light into flashes of blue, violet, green, yellow, orange, and red. These natural rainbow displays appear and disappear as the viewing angle changes, making the specimen especially engaging in person.\u003c\/p\u003e\n\u003cp data-start=\"889\" data-end=\"1296\"\u003eIts wedge-shaped form is defined by calcite’s characteristic rhombohedral cleavage. Large flat surfaces provide clear views into the interior, where overlapping planes and subtle internal structures create shifting reflections and optical depth. Calcite is also naturally birefringent, meaning that clear portions can split transmitted light and produce double images when viewed over text or fine patterns.\u003c\/p\u003e\n\u003cp data-start=\"1298\" data-end=\"1627\"\u003eMeasuring approximately 2.25 × 1 × 2.25 inches and weighing 0.32 pounds, this compact specimen combines excellent clarity, strong rainbow activity, educational optical properties, and convenient freestanding display. Its high transparency and colorful internal reflections distinguish it from more ordinary cloudy calcite pieces.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1a3ueyz\" data-start=\"1629\" data-end=\"1646\"\u003eSpecifications\u003c\/h2\u003e\n\u003cp data-start=\"1648\" data-end=\"1664\"\u003eMineral: Calcite\u003c\/p\u003e\n\u003cp data-start=\"1666\" data-end=\"1732\"\u003eVariety\/Trade Description: Rainbow Optical Calcite — Extra Quality\u003c\/p\u003e\n\u003cp data-start=\"1734\" data-end=\"1762\"\u003eLocality: Maharashtra, India\u003c\/p\u003e\n\u003cp data-start=\"1764\" data-end=\"1806\"\u003eWeight: 0.32 lbs (approximately 145 grams)\u003c\/p\u003e\n\u003cp data-start=\"1808\" data-end=\"1856\"\u003eDimensions: Approximately 2.25 × 1 × 2.25 inches\u003c\/p\u003e\n\u003cp data-start=\"1858\" data-end=\"1934\"\u003eColor: Colorless to icy white with multicolored internal rainbow reflections\u003c\/p\u003e\n\u003cp data-start=\"1936\" data-end=\"2010\"\u003eForm: Natural cleavage specimen with a wedge-shaped, architectural profile\u003c\/p\u003e\n\u003cp data-start=\"2012\" data-end=\"2042\"\u003eLuster: Vitreous to glass-like\u003c\/p\u003e\n\u003cp data-start=\"2044\" data-end=\"2084\"\u003eTransparency: Transparent to translucent\u003c\/p\u003e\n\u003cp data-start=\"2086\" data-end=\"2178\"\u003eOptical Property: Strong birefringence or double refraction through sufficiently clear areas\u003c\/p\u003e\n\u003cp data-start=\"2180\" data-end=\"2296\"\u003eRainbow Effect: Natural spectral flashes produced where light interacts with internal cleavage and fracture surfaces\u003c\/p\u003e\n\u003cp data-start=\"2298\" data-end=\"2322\"\u003eCrystal System: Trigonal\u003c\/p\u003e\n\u003cp data-start=\"2324\" data-end=\"2347\"\u003eChemical Formula: CaCO₃\u003c\/p\u003e\n\u003cp data-start=\"2349\" data-end=\"2379\"\u003eMohs Hardness: Approximately 3\u003c\/p\u003e\n\u003cp data-start=\"2381\" data-end=\"2477\"\u003eDisplay: Naturally self-standing; display stand shown is not included unless otherwise specified\u003c\/p\u003e\n\u003cp data-start=\"2479\" data-end=\"2616\"\u003eCondition: Natural calcite specimen with inherent cleavage lines, internal fractures, contacts, surface textures, and edge irregularities\u003c\/p\u003e\n\u003cp data-start=\"2618\" data-end=\"2638\"\u003eExact specimen shown\u003c\/p\u003e\n\u003ch2 data-section-id=\"g70bqp\" data-start=\"2640\" data-end=\"2664\"\u003eAbout Optical Calcite\u003c\/h2\u003e\n\u003cp data-start=\"2666\" data-end=\"2929\"\u003eCalcite is a calcium carbonate mineral with the chemical formula CaCO₃. It crystallizes in the trigonal system and is well known for its perfect rhombohedral cleavage, which allows it to separate along three consistent directions that do not meet at right angles.\u003c\/p\u003e\n\u003cp data-start=\"2931\" data-end=\"3225\"\u003eExceptionally transparent calcite is often described as optical calcite because of its pronounced birefringence. Light entering the mineral is divided into two rays traveling at different speeds. When a clear piece is placed over text or a fine line, this effect can produce two visible images.\u003c\/p\u003e\n\u003cp data-start=\"3227\" data-end=\"3509\"\u003eThe rainbow colors are a separate optical phenomenon. Thin internal fractures and cleavage separations act as natural prisms or interference surfaces, dividing white light into spectral colors. The intensity and position of these rainbows change with the lighting and viewing angle.\u003c\/p\u003e\n\u003cp data-start=\"3511\" data-end=\"3729\"\u003eCalcite is significantly softer than quartz and possesses perfect cleavage. It should be handled carefully, kept away from acids, and cleaned without soaking. A soft dry brush or gentle microfiber cloth is recommended.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1punl39\" data-start=\"3731\" data-end=\"3749\"\u003eCollector Notes\u003c\/h2\u003e\n\u003cp data-start=\"3751\" data-end=\"3774\"\u003eThis specimen features:\u003c\/p\u003e\n\u003cul data-start=\"3776\" data-end=\"4358\"\u003e\n\u003cli data-section-id=\"1eybxuz\" data-start=\"3776\" data-end=\"3807\"\u003eExtra-quality optical calcite\u003c\/li\u003e\n\u003cli data-section-id=\"1xarldk\" data-start=\"3808\" data-end=\"3857\"\u003eTransparent to highly translucent viewing areas\u003c\/li\u003e\n\u003cli data-section-id=\"zqi477\" data-start=\"3858\" data-end=\"3890\"\u003eVivid internal rainbow flashes\u003c\/li\u003e\n\u003cli data-section-id=\"125b9pv\" data-start=\"3891\" data-end=\"3952\"\u003eBlue, violet, green, yellow, orange, and red spectral color\u003c\/li\u003e\n\u003cli data-section-id=\"y7ruez\" data-start=\"3953\" data-end=\"3986\"\u003eBroad natural cleavage surfaces\u003c\/li\u003e\n\u003cli data-section-id=\"oqco3w\" data-start=\"3987\" data-end=\"4034\"\u003eStrong internal depth and layered reflections\u003c\/li\u003e\n\u003cli data-section-id=\"13qbx20\" data-start=\"4035\" data-end=\"4086\"\u003eCalcite’s characteristic double-refraction effect\u003c\/li\u003e\n\u003cli data-section-id=\"1qbd5v5\" data-start=\"4087\" data-end=\"4132\"\u003eDistinctive wedge-shaped architectural form\u003c\/li\u003e\n\u003cli data-section-id=\"hjsldz\" data-start=\"4133\" data-end=\"4171\"\u003eNaturally self-standing presentation\u003c\/li\u003e\n\u003cli data-section-id=\"nkpssa\" data-start=\"4172\" data-end=\"4215\"\u003eCompact size with excellent visual impact\u003c\/li\u003e\n\u003cli data-section-id=\"1q7iliw\" data-start=\"4216\" data-end=\"4250\"\u003eMaterial from Maharashtra, India\u003c\/li\u003e\n\u003cli data-section-id=\"jv8bt8\" data-start=\"4251\" data-end=\"4291\"\u003eBoth decorative and educational appeal\u003c\/li\u003e\n\u003cli data-section-id=\"xjwr3e\" data-start=\"4292\" data-end=\"4332\"\u003eOne-of-a-kind natural mineral specimen\u003c\/li\u003e\n\u003cli data-section-id=\"1bmwm75\" data-start=\"4333\" data-end=\"4358\"\u003eExact specimen pictured\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"4360\" data-end=\"4567\"\u003ePerfect for collectors of optical calcite, rainbow calcite, transparent minerals, birefringent crystals, natural optical phenomena, Indian minerals, educational specimens, and self-standing mineral displays.\u003c\/p\u003e\n\u003cp data-start=\"4569\" data-end=\"4619\"\u003eProfessionally packaged and shipped from Colorado.\u003c\/p\u003e\n\u003cp data-start=\"4621\" data-end=\"4663\"\u003eYou will receive the exact specimen shown.\u003c\/p\u003e\n\u003cp data-start=\"4665\" data-end=\"4800\"\u003eEvery order is backed by our commitment to quality and customer satisfaction. Thank you for supporting our family-owned small business.\u003c\/p\u003e","brand":"Serenity Soul Stones","offers":[{"title":"Default Title","offer_id":49743751708922,"sku":null,"price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/2328\/8826\/files\/RainbowOpticalCalcite_Maharashtra_India_0.32lbs_5.jpg?v=1784836056","url":"https:\/\/serenitysoulstones.com\/products\/rainbow-optical-calcite-maharashtra-india-0-32-lbs","provider":"Serenity Soul Stones","version":"1.0","type":"link"}