{"product_id":"heat-treated-citrine","title":"Heat treated Citrine Polished Flame","description":"\u003cp\u003eHeat-Treated Citrine Quartz Freeform – Polished Flame with Internal Rainbows\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThis polished citrine quartz freeform is a striking display piece, shaped into a smooth flame form that enhances both colour and internal structure. The piece shows vibrant yellow to golden tones, paired with complex internal textures and light-reactive features.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe colour in this specimen has been produced through heat treatment of iron-bearing quartz (commonly amethyst or smoky quartz). When exposed to elevated temperatures, iron within the crystal lattice undergoes a change in oxidation state, resulting in the characteristic yellow colour associated with citrine.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe high polish allows light to pass deeply into the stone, revealing internal fractures, veils, and scattered mineral inclusions. These features create visible rainbow refractions when light hits at the right angle, adding movement and visual depth.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eA distinct internal banding\/growth zone runs diagonally through the piece, marking different stages of crystal development prior to shaping. This provides a clear view into the crystal’s formation history.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eThe freeform has been carved to maintain an organic, flowing silhouette, with a stable flat base for display. The curved surfaces act as natural lenses, amplifying the internal structures and colour saturation.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e🔍 Key Features\u003cbr\u003eMaterial: Heat-Treated Quartz (Citrine)\u003cbr\u003eFormula: SiO₂\u003cbr\u003eColour: Bright yellow → golden\u003cbr\u003eCause of Colour: Iron impurities altered by heat treatment\u003cbr\u003eTransparency: Translucent to semi-transparent\u003cbr\u003eLustre: Vitreous (glassy)\u003cbr\u003eCrystal System: Trigonal\u003cbr\u003eFormation: Polished freeform (carved from natural quartz)\u003cbr\u003eFinish: High polish\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e📏 Dimensions\u003cbr\u003eSize: 11 cm x 7 cm\u003cbr\u003eWeight: 376 grams\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e🧪 Geological \u0026amp; Scientific Notes\u003cbr\u003eQuartz naturally forms in silica-rich environments such as hydrothermal veins and volcanic cavities. Trace iron within the structure is responsible for colour variations across quartz varieties.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eIn this piece, heat treatment replicates the natural process that can occur underground, where elevated temperatures alter iron centres within the crystal lattice. This results in the yellow coloration seen in citrine.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eInternal fractures and inclusions formed during crystal growth are preserved during polishing, and these features are responsible for light dispersion effects such as rainbow reflections.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e🧼 Care Information\u003cbr\u003eClean with lukewarm water and a soft cloth\u003cbr\u003eAvoid harsh chemicals\u003cbr\u003eStore separately to prevent scratching\u003cbr\u003eHandle carefully to avoid chips on edges\u003c\/p\u003e","brand":"Crystal Ballerz","offers":[{"title":"Default Title","offer_id":53756031369557,"sku":null,"price":25.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1039\/9295\/1125\/files\/rn-image_picker_lib_temp_01172681-6c6a-4307-8c59-5408e87a9653.jpg?v=1776966205","url":"https:\/\/crystalballerz.co.uk\/products\/heat-treated-citrine","provider":"Crystal Ballerz","version":"1.0","type":"link"}