{"id":1834,"date":"2026-04-26T17:39:24","date_gmt":"2026-04-26T15:39:24","guid":{"rendered":"https:\/\/mineralien-weltweit.com\/product\/sunstone-bjordam-quarry-norway\/"},"modified":"2026-04-26T17:39:24","modified_gmt":"2026-04-26T15:39:24","slug":"sunstone-bjordam-quarry-norway","status":"publish","type":"product","link":"https:\/\/mineralien-weltweit.com\/en\/product\/sunstone-bjordam-quarry-norway\/","title":{"rendered":"Sunstone from the Bjordam Quarry, Norway"},"content":{"rendered":"<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"55\" data-end=\"279\">This sunstone specimen comes from the Bjordam Sunstone Quarry near Bjordammen in Bamble, Telemark, Norway. One side has been polished to make the reflective inclusions within the feldspar more clearly visible. <\/p>\n<p data-start=\"281\" data-end=\"553\">Under direct illumination, the polished surface displays orange-red to copper-colored aventurescence. This glittering effect is caused by fine, preferentially oriented hematite inclusions within the feldspar. The intensity of the reflections changes depending on the angle of illumination.  <\/p>\n<p data-start=\"555\" data-end=\"647\">With dimensions of 3.4 \u00d7 3.0 \u00d7 1.0 cm, the piece belongs to the miniature specimen size category.<\/p>\n<h3 data-section-id=\"1y4cqso\" data-start=\"649\" data-end=\"696\">Aventurescent Oligoclase from Bjordammen<\/h3>\n<p data-start=\"698\" data-end=\"910\">The Bjordam Sunstone Quarry is a specialized Norwegian locality for aventurescent plagioclase feldspar. Material from this locality is predominantly described as oligoclase sunstone. <\/p>\n<p data-start=\"912\" data-end=\"1139\">Oligoclase belongs to the plagioclase series and is a sodium-rich feldspar. The characteristic aventurescence of the material from Bjordammen is caused by fine hematite platelets that reflect incoming light. <\/p>\n<p data-start=\"1141\" data-end=\"1334\">The polished display surface clearly reveals the orange-red to copper-colored reflections. The unpolished edges also preserve the natural appearance of the specimen. <\/p>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1336\" data-end=\"1874\" data-is-last-node=\"\" data-is-only-node=\"\">\n<thead data-start=\"1336\" data-end=\"1357\">\n<tr data-start=\"1336\" data-end=\"1357\">\n<th class=\"last:pe-10\" data-start=\"1336\" data-end=\"1346\" data-col-size=\"sm\">Feature <\/th>\n<th class=\"last:pe-10\" data-start=\"1346\" data-end=\"1357\" data-col-size=\"md\">Details<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1368\" data-end=\"1874\" data-is-last-node=\"\">\n<tr data-start=\"1368\" data-end=\"1423\">\n<td data-start=\"1368\" data-end=\"1378\" data-col-size=\"sm\">Mineral<\/td>\n<td data-start=\"1378\" data-end=\"1423\" data-col-size=\"md\">Sunstone, aventurescent oligoclase<\/td>\n<\/tr>\n<tr data-start=\"1424\" data-end=\"1463\">\n<td data-start=\"1424\" data-end=\"1440\" data-col-size=\"sm\">Mineral Group<\/td>\n<td data-start=\"1440\" data-end=\"1463\" data-col-size=\"md\">Plagioclase feldspar<\/td>\n<\/tr>\n<tr data-start=\"1464\" data-end=\"1489\">\n<td data-start=\"1464\" data-end=\"1478\" data-col-size=\"sm\">Inclusions<\/td>\n<td data-start=\"1478\" data-end=\"1489\" data-col-size=\"md\">Hematite<\/td>\n<\/tr>\n<tr data-start=\"1490\" data-end=\"1567\">\n<td data-start=\"1490\" data-end=\"1500\" data-col-size=\"sm\">Locality<\/td>\n<td data-start=\"1500\" data-end=\"1567\" data-col-size=\"md\"> Bjordam Sunstone Quarry, Bjordammen, Bamble, Telemark, Norway<\/td>\n<\/tr>\n<tr data-start=\"1568\" data-end=\"1604\">\n<td data-start=\"1568\" data-end=\"1582\" data-col-size=\"sm\">Dimensions<\/td>\n<td data-start=\"1582\" data-end=\"1604\" data-col-size=\"md\">3.4 \u00d7 3.0 \u00d7 1.0 cm<\/td>\n<\/tr>\n<tr data-start=\"1605\" data-end=\"1625\">\n<td data-start=\"1605\" data-end=\"1615\" data-col-size=\"sm\">Weight<\/td>\n<td data-start=\"1615\" data-end=\"1625\" data-col-size=\"md\">20.9 g<\/td>\n<\/tr>\n<tr data-start=\"1626\" data-end=\"1657\">\n<td data-start=\"1626\" data-end=\"1640\" data-col-size=\"sm\">Specimen Size<\/td>\n<td data-start=\"1640\" data-end=\"1657\" data-col-size=\"md\">Miniature specimen<\/td>\n<\/tr>\n<tr data-start=\"1658\" data-end=\"1707\">\n<td data-start=\"1658\" data-end=\"1666\" data-col-size=\"sm\">Color<\/td>\n<td data-start=\"1666\" data-end=\"1707\" data-col-size=\"md\">Orange-red, reddish-brown to copper-colored<\/td>\n<\/tr>\n<tr data-start=\"1708\" data-end=\"1744\">\n<td data-start=\"1708\" data-end=\"1727\" data-col-size=\"sm\">Optical Effect<\/td>\n<td data-start=\"1727\" data-end=\"1744\" data-col-size=\"md\">Aventurescence<\/td>\n<\/tr>\n<tr data-start=\"1745\" data-end=\"1781\">\n<td data-start=\"1745\" data-end=\"1759\" data-col-size=\"sm\">Preparation<\/td>\n<td data-start=\"1759\" data-end=\"1781\" data-col-size=\"md\">One side polished<\/td>\n<\/tr>\n<tr data-start=\"1782\" data-end=\"1874\" data-is-last-node=\"\">\n<td data-start=\"1782\" data-end=\"1797\" data-col-size=\"sm\">Special Feature<\/td>\n<td data-start=\"1797\" data-end=\"1874\" data-is-last-node=\"\" data-col-size=\"md\">Aventurescent oligoclase from a Norwegian sunstone occurrence<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>This sunstone specimen comes from the Bjordam Sunstone Quarry near Bjordammen in Bamble, Telemark, Norway. One side has been polished to make the reflective inclusions within the feldspar more clearly visible. Under direct illumination, the polished surface displays orange-red to copper-colored aventurescence. This glittering effect is caused by fine, preferentially oriented hematite inclusions within the [&#8230;]\n","protected":false},"featured_media":1831,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[351],"product_tag":[],"class_list":["post-1834","product","type-product","status-publish","has-post-thumbnail","product_cat-minerals","first","instock","sold-individually","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sunstone from the Bjordam Quarry, Norway<\/title>\n<meta name=\"description\" content=\"Polished oligoclase sunstone with orange-red to copper-colored aventurescence caused by hematite inclusions from Bjordammen, Norway.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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