{"product_id":"grisun-onyx-black-fire-glass-1-2-inch-10-lb-tempered-decorative-fire-pit-glass-heat-resistant-finish","title":"GRISUN Onyx Black Fire Glass 1\/2-Inch 10 lb — Tempered Decorative Fire Pit Glass, Heat-Resistant Finish","description":"\u003cp\u003e\u003cstrong\u003eGRISUN Onyx Black Fire Glass is a 10-pound bag of 1\/2-inch tempered glass gems designed to replace lava rock and enhance the look and heat dispersion of gas or electric fire pits and indoor fireplaces.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis onyx-black fire glass blends deep matte tones with a subtle luster that reflects flames without melting or fading. Manufactured to withstand high temperatures and common outdoor conditions, these uniform 1\/2-inch pieces create a clean, modern baseline for fire features, fire tables, and decorative installations like aquarium accents. The product is compatible with propane, natural gas, and electric flame sources and is supplied in a convenient 10 lb package sized for small to medium burners.\u003c\/p\u003e\n\n\u003ch3\u003eHow will GRISUN Onyx Black fire glass change the look of my fire pit or fireplace?\u003c\/h3\u003e\n\u003cp\u003eThe dark onyx color provides a refined, contemporary backdrop that makes flames appear brighter and more defined. Because the pieces are uniform 1\/2-inch tempered glass, they settle evenly and create a smooth visual plane that complements metal burners and stone surrounds.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDeep matte-black finish enhances flame contrast and color.\u003c\/li\u003e\n  \u003cli\u003eUniform size for an even, professional-looking spread.\u003c\/li\u003e\n  \u003cli\u003eWorks well over lava rock or directly on compatible burner pans.\u003c\/li\u003e\n  \u003cli\u003eReflective surfaces add subtle sparkle without overwhelming brightness.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fire glass withstand heat and outdoor exposure without degrading?\u003c\/h3\u003e\n\u003cp\u003eYes — GRISUN fire glass is tempered and engineered for high-heat environments, offering resistance to corrosion, fading, and thermal shock. It retains heat for a short time after the flame is off but does not combust, and the appearance will remain stable over repeated heating cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTempered glass resists cracking under typical burner temperatures.\u003c\/li\u003e\n  \u003cli\u003eFade- and corrosion-resistant for prolonged outdoor use.\u003c\/li\u003e\n  \u003cli\u003eNon-combustible material that won’t melt or emit toxic fumes.\u003c\/li\u003e\n  \u003cli\u003eEasy to maintain — rinse or brush to remove soot or dust.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow much GRISUN Onyx Black fire glass do I need and how should I install it?\u003c\/h3\u003e\n\u003cp\u003eA 10 lb bag of 1\/2-inch glass is suitable for topping small burners or refreshing sections of medium-sized fire pits. Installation is straightforward: cover the gas log or burner with a thin layer of lava rock if recommended, then spread the glass evenly to the recommended depth for your burner model.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10 lb covers small burners or adds a decorative layer to medium pits.\u003c\/li\u003e\n  \u003cli\u003eRecommended to follow your burner manufacturer’s depth guidelines.\u003c\/li\u003e\n  \u003cli\u003eInstall over lava rock or directly on approved burner pans per instructions.\u003c\/li\u003e\n  \u003cli\u003eKeep glass away from direct contact with flames if your setup requires spacing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this fire glass safe for indoor fireplaces or aquariums?\u003c\/h3\u003e\n\u003cp\u003eGRISUN Onyx Black is safe for indoor gas and electric fireplaces when installed according to appliance instructions. Some users also incorporate tempered glass into aquarium designs as decorative substrate; verify aquarium-safe finishes and rinse glass thoroughly before use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with propane, natural gas, and many electric fireplaces.\u003c\/li\u003e\n  \u003cli\u003eFollow appliance guidelines for indoor installations to ensure ventilation.\u003c\/li\u003e\n  \u003cli\u003eRinse glass before aquarium use and avoid coated or treated decorative pieces.\u003c\/li\u003e\n  \u003cli\u003eDo not use in solid-fuel wood fires or any application not specified by the appliance maker.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Homeowners and designers who want a modern, low-maintenance finish for gas or electric fire features will appreciate GRISUN Onyx Black fire glass. It's aimed at people upgrading existing fireplaces, styling fire tables, or adding contemporary flair to outdoor patios. DIY installers and professional landscapers alike will value the consistent size, heat resistance, and decorative appeal packed in the convenient 10 lb quantity.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use GRISUN fire glass with propane or natural gas?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. This tempered glass works with propane, natural gas, and many electric burners when installed according to the appliance instructions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the fire glass melt or fade over time?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. The tempered glass resists melting and fading and is designed to withstand repeated heating without degrading.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GRISUN","offers":[{"title":"Default Title","offer_id":56833183842644,"sku":"B0BTY6DQ9T","price":72.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/grisun-onyx-front-packaging.jpg?v=1787038615","url":"https:\/\/gardenluxe.co.uk\/products\/grisun-onyx-black-fire-glass-1-2-inch-10-lb-tempered-decorative-fire-pit-glass-heat-resistant-finish","provider":"Gardenluxe Uk","version":"1.0","type":"link"}