{"product_id":"rocks-canada-rock-tumbling-grit-stage-1-coarse-60-90-grit","title":"Rock Tumbling Grit - Stage 1 Coarse 60\/90 Grit - Silicon Carbide","description":"\u003cp\u003eOur\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e60\/90 silicon carbide\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eStage 1 coarse tumbling grit for rotary tumblers\u003c\/strong\u003e, used to shape rough rock, remove weathered outer surfaces, round sharp edges, and prepare stones for the later stages of tumbling. If you want smooth, well-shaped stones that are ready for medium, fine, and polish, this is where the process starts.\u003c\/p\u003e\n\u003cp\u003eA good polish begins with a good coarse grind. Skip this stage or rush it, and the flaws usually show up later.\u003c\/p\u003e\n\u003ch3\u003eWhat Stage 1 Grit Does\u003c\/h3\u003e\n\u003cp\u003eStage 1 is the shaping stage. This coarse grit helps:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRemove weathered rind and rough outer surfaces\u003c\/li\u003e\n\u003cli\u003eRound off sharp edges and corners\u003c\/li\u003e\n\u003cli\u003eSmooth rough texture and surface irregularities\u003c\/li\u003e\n\u003cli\u003eBegin shaping rough rock into tumble-ready stones\u003c\/li\u003e\n\u003cli\u003ePrepare rocks for Stage 2 medium grit and later polishing stages\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor many batches,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eStage 1 is the longest and most important step\u003c\/strong\u003e. Some rocks need more than one coarse run before they’re ready to move on.\u003c\/p\u003e\n\u003ch3\u003eBest For\u003c\/h3\u003e\n\u003cp\u003eUse this grit when you want to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStart a new batch of rough rock in a rotary tumbler\u003c\/li\u003e\n\u003cli\u003eShape and smooth freshly collected stones\u003c\/li\u003e\n\u003cli\u003eRemove weathering, rind, and damaged outer surfaces\u003c\/li\u003e\n\u003cli\u003eRound angular rocks before finer stages\u003c\/li\u003e\n\u003cli\u003eBuild the foundation for a better final polish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot For\u003c\/h3\u003e\n\u003cp\u003eThis grit is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003enot\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFinal polishing\u003c\/li\u003e\n\u003cli\u003ePre-polish\u003c\/li\u003e\n\u003cli\u003eQuick shine improvement\u003c\/li\u003e\n\u003cli\u003eVibratory finishing stages\u003c\/li\u003e\n\u003cli\u003eSkipping straight to glossy results\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you want bright, polished stones, this is the beginning of that process — not the end.\u003c\/p\u003e\n\u003ch3\u003eRotary Tumblers Only\u003c\/h3\u003e\n\u003cp\u003eThis\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e60\/90 coarse grit is intended for Stage 1 use in rotary tumblers\u003c\/strong\u003e. It is designed for aggressive grinding and shaping at the start of the tumbling process.\u003c\/p\u003e\n\u003cp\u003eIf you're working through a full tumbling cycle, this is your first step before moving on to medium, fine, and polish.\u003c\/p\u003e\n\u003ch3\u003eHow to Use It\u003c\/h3\u003e\n\u003cp\u003eFor most rotary tumbler batches:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFill the barrel about\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2\/3 to 3\/4 full\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eUse a mix of rock sizes for better tumbling action\u003c\/li\u003e\n\u003cli\u003eAdd about\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e1 tablespoon of grit per pound of rock\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdd water until it is just visible among the top layer of stones\u003c\/li\u003e\n\u003cli\u003eRun the batch, then inspect the rocks carefully before moving to the next stage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your stones still have pits, cracks, rough texture, or weathered areas after one run, they likely need another Stage 1 cycle.\u003c\/p\u003e\n\u003ch3\u003eHow Much Do You Need?\u003c\/h3\u003e\n\u003cp\u003eThe right size depends on how often you tumble and how much rough you process.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample - 2 oz:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003egood for testing or very small batches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall Bottle - 8 oz:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003egood starter size for occasional tumbling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium Bottle - 16 oz:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ea solid all-around size for regular hobby use\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Tub - 32 oz \/ 3 lb:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003egood value for frequent tumbling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk Bag - 10 lb or 25 lb:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eideal for heavy use, repeat Stage 1 runs, clubs, classrooms, or serious hobbyists\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause coarse grit is often used for multiple runs, many tumblers go through\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003emore Stage 1 grit than any other stage\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhy Coarse Grit Matters\u003c\/h3\u003e\n\u003cp\u003eThe quality of your later stages depends on how well you do this one.\u003c\/p\u003e\n\u003cp\u003eMedium grit, fine grit, and polish won’t fix rocks that still have deep pits, rough areas, or weathered surfaces. A proper Stage 1 run helps create smoother, more even stones that are ready for the rest of the tumbling process.\u003c\/p\u003e\n\u003cp\u003eIn other words:\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebetter shaping now means better polish later\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Rocks Canada","offers":[{"title":"Sample - 2 oz - 0.15 lb","offer_id":43747582902337,"sku":"RC-GRIT-6090SC-02OZ","price":4.95,"currency_code":"CAD","in_stock":true},{"title":"Small Bottle - 8 oz - 0.75 lb","offer_id":43718819676225,"sku":"RC-GRIT-6090SC-08OZ","price":12.95,"currency_code":"CAD","in_stock":true},{"title":"Medium Bottle - 16 oz - 1.5 lb","offer_id":43718819708993,"sku":"RC-GRIT-6090SC-16OZ","price":16.95,"currency_code":"CAD","in_stock":true},{"title":"Large Tub - 32 oz - 3 lb","offer_id":43718819741761,"sku":"RC-GRIT-6090SC-32OZ","price":26.95,"currency_code":"CAD","in_stock":true},{"title":"Bulk Bag - 10 lb","offer_id":43723961565249,"sku":"RC-GRIT-6090SC-10LB","price":50.95,"currency_code":"CAD","in_stock":true},{"title":"Bulk Bag - 25 lb","offer_id":43718833143873,"sku":"RC-GRIT-6090SC-25LB","price":111.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/6400\/9537\/files\/3lb.png?v=1775671015","url":"https:\/\/rockscanada.ca\/products\/rocks-canada-rock-tumbling-grit-stage-1-coarse-60-90-grit","provider":"Rocks Canada by All-Star Telescope","version":"1.0","type":"link"}