{"type":"product","schema_version":"1.0","item_id":"100123441051","canonical_url":"https://tw.bid.yahoo.com/item/100123441051","title":"玉見真實 珠寶鑑定儀器-便攜式 寶石偏光鏡 內置光源 偏光儀 珠寶/鑽石/水晶 光性 光學特徵鑒定 MCOTPO001","subtitle":null,"condition":"全新品","currency":"TWD","observed_at":"2026-04-26T01:06:36.892Z","current_price":1950,"original_price":null,"stock_status":"in_stock","available_quantity":99,"sold_quantity":1,"seller":{"id":"Y7588588315","name":"玉見真實 珠寶鑑定儀器暨用品店","positive_rate":null,"rating_count":null},"images":[{"url":"https://img.yec.tw/ob/image/0ce89a39-f141-47f1-b689-56d939b3f7f4.jpg","role":"main","alt":"商品主圖","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/c5ca3d85-1471-4bef-ac2b-31d75b7ba246.jpg","role":"detail","alt":"商品圖片 2","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/45c8dfd4-e6fa-4dbd-a593-d8c421fe9b14.jpg","role":"detail","alt":"商品圖片 3","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/a08b3140-ab3b-4390-a914-a212ff80d361.jpg","role":"detail","alt":"商品圖片 4","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/33037d4c-cdd1-451c-81cb-5c7d8aa2844f.jpg","role":"detail","alt":"商品圖片 5","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/94dae389-4eaf-46d9-a34f-a904f9ff8982.jpg","role":"detail","alt":"商品圖片 6","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/745d9293-5191-4938-9320-27e6b7c1690b.jpg","role":"detail","alt":"商品圖片 7","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/3e9a363a-9388-4904-ba3f-f9c96352eee8.jpg","role":"detail","alt":"商品圖片 8","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/769b0e73-18da-4aa7-ac49-2182f7c730ce.jpg","role":"detail","alt":"商品圖片 9","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/83a76215-cc31-4433-ba52-dfbb27bfd612.jpg","role":"detail","alt":"商品圖片 10","width":null,"height":null}],"description":"商品說明\n\n名稱：便攜式 偏光鏡 內置光源 寶石偏光鏡 光性 光學特徵鑒定\n\n規格：\n\n1.全黑鋁合金外殼\n\n2.24mm直徑偏光片；\n\n3.可卸式旋轉樣品室；\n\n4.紐扣電池供電,使用方便；\n\n5.內置長壽命黃光LED暖光源.\n\n6.規格：直徑3.3CM*高度9.3CM\n\n型式：\n\n編號：MCOTPO001\n\n數量：99件以上\n\n備註：該偏光鏡是出於攜帶方便而設計，載物台直徑是3CM左右，大於3CM直徑的寶石都無法觀察。要觀察大些的寶石，建議買臺式的偏光儀\n\n操作步驟\n\n擦淨寶石，打開光源\n\n調節上偏光片，使其與下偏光片正交（視域黑暗）\n\n將寶石置於玻璃載物臺上旋轉360度，從上偏光片上方觀察寶石明暗\n\n若為雙折射材料（轉動一週四明四暗），用干涉球找光軸，觀察干涉圖，定軸性\n\n現象解釋\n\n現象：四明四暗\n\n正交偏光下，轉動寶石一周，出現四明四暗變化\n\n結論：非均質體寶石的非光軸方向，如水晶、紅藍寶等\n\n全暗（全消光）\n\n正交偏光下，轉動寶石360度，沒有光線透過、全暗\n\n結論：均質體寶石或非均質體的光軸方向，如石榴子石、尖晶石、玻璃等\n\n特別提示：非均質體光軸方向會出現干涉圖\n\n集體消光\n\n正交偏光下，轉動寶石一周，始終明亮\n\n結論：非均質體的多晶集合體寶石，如瑪瑙、翡翠、石英岩石等\n\n原因：\n\n1.集合體寶石半透明—近透明，正光鏡下，總有部分顆粒不在消光位元，因而總有光線透過，總體明亮\n\n2.顆粒邊界光線的透過也會產生明亮的效果\n\n特別提示：非均質體寶石由於裂隙發育，也會出現鏡現象，如祖母綠、紅寶石常見\n\n幾種特殊現象\n\n異常消光：均質體寶石由於受應力作用在正交偏光鏡下表現的不均勻的消光現象\n\n常見：\n\n1）斑紋狀、波狀、格子狀、蛇皮狀：合成尖晶石常見\n\n2）假十字消光：常見於玻璃、塑膠及其他人工合成材料中\n\n結論：均質體寶石\n\n異常消光的確定方法：上下偏光片正交是將寶石轉至最亮，快速旋轉上偏光片，如果寶石更亮，則為異常消光，不發生變化為雙折射消光\n\n全暗假像\n\n某些高折射的寶石：鋯石、金紅石等，檯面向下放置有時候由於全反射幾乎沒有光線透過，出現全暗現象\n\n解決方法：可以選擇不同的刻面放置，並結合其他儀器判定\n\n全亮現象：裂隙特發育寶石（祖母綠、紅寶石常見）\n\n干涉圖的觀察\n\n原理：光線在非均質體寶石中傳播，產生雙折射，分解成兩條振動方向相互垂直的偏光，二者的RI不同（傳播速度不同）造成一定的光程差，經錐光的會聚產生干涉作用，而形成干涉圖\n\n現象：\n\n1）一軸晶干涉圖：黑十字加干涉色圈\n\n2）二軸晶干涉圖：彎曲的單（雙）臂＋干涉色圈\n\n3）牛眼干涉圖（中空十字及干涉色圈）：水晶類寶石（特有）\n\n4）螺旋槳狀干涉圖：某些紫晶（具有複雜雙晶的、合成的一般沒有）\n\n3、觀察方法\n\n1）上下偏光出於正交位置\n\n2）全方位轉動寶石尋找光軸方向（出現干涉色的方法）\n\n3）在干涉色最密集的方向加干涉球觀察\n\n4）干涉球的位於上偏光片與寶石之間\n\n特別提示：干涉圖僅在透明非均質體寶石的單晶體中出現","shipping_methods":[{"name":"郵局掛號","fee":0,"currency":"TWD"},{"name":"7-ELEVEN取貨付款","fee":0,"currency":"TWD"},{"name":"面交/自取/不寄送","fee":0,"currency":"TWD"},{"name":"萊爾富取貨付款","fee":0,"currency":"TWD"}],"lowest_shipping_fee":null,"payment_methods":["ATM轉帳","萊爾富取貨付款","7-ELEVEN取貨付款"],"category_id":"20452","category_name":"其他","breadcrumb":[{"id":"20000","name":"古董、藝術與礦石","url":"/tw/%E5%8F%A4%E8%91%A3%E3%80%81%E8%97%9D%E8%A1%93%E8%88%87%E7%A4%A6%E7%9F%B3-20000-category.html"},{"id":"20452","name":"其他","url":"/tw/%E5%85%B6%E4%BB%96-20452-category.html"}],"view_count":0,"watch_count":5}