{"product_id":"grisun-onyx-black-fire-glass-diamonds-1-20-lb-reflective-tempered-glass-for-fire-pits-fireplaces","title":"GRISUN Onyx Black Fire Glass Diamonds 1\" 20 lb – Reflective Tempered Glass for Fire Pits \u0026 Fireplaces","description":"\u003cp\u003e\u003cstrong\u003eGRISUN Onyx Black Fire Glass Diamonds are 1-inch reflective black glass pieces sold in a 20-pound bag to upgrade gas, propane, or electric fireplaces and outdoor fire pits with a modern, low-maintenance finish.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese Onyx Black fire glass diamonds give your fire feature a sleek, contemporary look while reflecting flame and light for dramatic visual depth. Made to resist heat, corrosion, and fading, the tempered glass replaces wood or lava rock in compatible gas and electric fire appliances, producing no smoke or lingering odors. The dark mirror-like finish enhances flame color and creates a lasting decorative base that’s easy to arrange and maintain.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this fire glass change the look of my fire pit or fireplace?\u003c\/h3\u003e\n\u003cp\u003eOnyx Black pieces create a clean, minimalist backdrop that intensifies flame contrast and adds shimmer from every angle. The mirror-like faces reflect both natural and artificial light, giving a sense of movement and greater flame presence without needing more fuel.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDeep black finish increases perceived flame brightness and depth\u003c\/li\u003e\n  \u003cli\u003eReflective surfaces bounce light for a glossy, modern appearance\u003c\/li\u003e\n  \u003cli\u003eUniform 1-inch diamonds create a consistent, contemporary bed\u003c\/li\u003e\n  \u003cli\u003e20 lb supply covers a variety of burner sizes depending on layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these glass diamonds work with my gas or electric system?\u003c\/h3\u003e\n\u003cp\u003eYes — GRISUN Onyx Black Fire Glass Diamonds are suitable for propane, natural gas, and electric fireplaces and fire tables when used as directed by the appliance manufacturer. They are not combustible and will not melt under normal appliance temperatures, making them a safe decorative option for approved systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with propane and natural gas burners\u003c\/li\u003e\n  \u003cli\u003eSafe for use in indoor glass fireplaces and outdoor fire pits rated for glass\u003c\/li\u003e\n  \u003cli\u003eNot intended for direct contact with open wood flames in wood-burning pits\u003c\/li\u003e\n  \u003cli\u003eFollow appliance guidelines for depth and coverage over the burner\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable and low-maintenance is this fire glass?\u003c\/h3\u003e\n\u003cp\u003eThe tempered glass resists fading, corrosion, and heat-related damage, so it keeps its shine through seasons of use. Unlike wood or stone, it won’t produce ash or creosote and requires only occasional rinsing or brushing to remove dust and soot buildup.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHeat-resistant glass that retains reflective finish\u003c\/li\u003e\n  \u003cli\u003eDoesn’t emit fumes or unpleasant smells during use\u003c\/li\u003e\n  \u003cli\u003eSimple cleaning: rinse with water and air-dry, no special chemicals\u003c\/li\u003e\n  \u003cli\u003eMaintains color and shine longer than many decorative media\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow much coverage does a 20-pound bag provide?\u003c\/h3\u003e\n\u003cp\u003eA 20-pound supply of 1-inch diamonds is suitable for small-to-medium burners or as a top layer for larger installations; coverage varies by burn pattern and desired depth. For a shallow aesthetic, the bag can dress most residential fire tables; for full coverage on larger pits you may need multiple bags to reach recommended depths over the burner.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEstimated coverage depends on burner width and desired glass depth\u003c\/li\u003e\n  \u003cli\u003eFor thin decorative layers, one bag often suffices for compact fire tables\u003c\/li\u003e\n  \u003cli\u003eDeeper beds or wider pits typically require additional 20 lb bags\u003c\/li\u003e\n  \u003cli\u003eArrange glass evenly to avoid exposing burner elements\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? GRISUN Onyx Black Fire Glass Diamonds are ideal for homeowners and designers seeking a modern, low-odor, and low-maintenance finish for gas or electric fireplaces, patio fire tables, and decorative indoor glass fireplaces. Choose this 20 lb pack if you want a dramatic black reflective bed that enhances flame visuals, reduces cleanup, and provides a durable decorative option for rated fire appliances.\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 Onyx Black fire glass with my propane fire pit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s safe for propane and natural gas burners when installed per your appliance’s instructions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I clean and maintain the fire glass?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Rinse or brush occasionally to remove dust and soot; air-dry before reinstalling. No special cleaners needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GRISUN","offers":[{"title":"Default Title","offer_id":56799584256340,"sku":"B0C8NNWVS3","price":114.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/grisun-onyx-black-front-packaging.jpg?v=1786734769","url":"https:\/\/gardenluxe.co.uk\/products\/grisun-onyx-black-fire-glass-diamonds-1-20-lb-reflective-tempered-glass-for-fire-pits-fireplaces","provider":"Gardenluxe Uk","version":"1.0","type":"link"}