{"product_id":"septarian-geode-nodule-with-calcite-crystal-cavity-and-brown-aragonite-veining-cut-and-polished-20260625","title":"Lot 073 - Septarian Geode Nodule with Calcite Crystal Cavity and Brown Aragonite Veining, Cut and Polished, 7\" L","description":"A septarian geode nodule, cut to reveal the interior structure. The polished face displays gray limestone segments separated by brown aragonite veining in angular, branching patterns. The center opens into a cavity lined with calcite crystals. The exterior retains its natural rough mudstone surface.","brand":"Granite Union Auction Company","offers":[{"title":"Default Title","offer_id":52851833471265,"sku":"20260625-LOT073","price":999999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0073\/9101\/9067\/files\/qa-lot061-mqda7jo9jb_17d88fe2-10c6-4a6e-bb2d-54a069896da8.jpg?v=1781551351","url":"https:\/\/graniteunionauction.com\/products\/septarian-geode-nodule-with-calcite-crystal-cavity-and-brown-aragonite-veining-cut-and-polished-20260625","provider":"Granite Union Auction Company","version":"1.0","type":"link"}