{"product_id":"rough-opal-with-polished-face-virgin-valley-nevada","title":"Rough Opal with Polished Face – Virgin Valley, Nevada","description":"\u003ch4\u003eAbout This Specimen\u003c\/h4\u003e\u003cp\u003eThis rough opal specimen from Virgin Valley, Nevada, has a broad polished top that reveals milky white opal within a contrasting tan-brown natural exterior. Subtle pale blue-gray margins add definition to the exposed opal, while fine hairline fractures remain visible across the polished surface.\u003c\/p\u003e\u003ch4\u003eSpecimen Details\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMineral \/ Specimen Type:\u003c\/strong\u003e Rough opal mineral specimen with a polished face\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocality:\u003c\/strong\u003e Virgin Valley, Nevada, USA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm \u0026amp; Structure:\u003c\/strong\u003e Massive to nodular rough material with a polished top surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Milky white opal with faint pale blue-gray margins in a tan-brown rough exterior; no distinct play-of-color is evident in the photographs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRarity:\u003c\/strong\u003e Common to uncommon; opal is widespread, while attributed Virgin Valley material offers added locality interest\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMohs Hardness:\u003c\/strong\u003e 5.5–6.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLuster:\u003c\/strong\u003e Waxy to vitreous on the polished face; dull to earthy on the rough exterior\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Formula:\u003c\/strong\u003e SiO₂·nH₂O\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecimen Size:\u003c\/strong\u003e Toenail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 3.8 × 2.3 × 3.5 cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecimen Weight:\u003c\/strong\u003e 29 g — mineral only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal \/ Display Weight:\u003c\/strong\u003e 28.9 g, seller-reported; verification recommended\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay Preparation:\u003c\/strong\u003e Mounted in a 2 × 2 × 2 inch display box\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eAbout Opal\u003c\/h4\u003e\u003cp\u003eOpal is an amorphous, hydrated form of silica rather than a mineral with an ordered crystal structure. Its composition is written as SiO₂·nH₂O, and its Mohs hardness typically ranges from 5.5 to 6.5. Opal may be transparent through opaque and can occur with or without play-of-color; this specimen presents a milky, non-play-of-color appearance in the supplied photographs.\u003c\/p\u003e\u003ch4\u003eTraditional \u0026amp; Metaphysical Associations\u003c\/h4\u003e\u003cp\u003eIn crystal and spiritual traditions, opal is often associated with creativity, inspiration, emotional expression, and intention-setting. Some collectors use it as a symbolic focus for meditation or simply appreciate its soft color and organic appearance as a contemplative display piece. \u003cem\u003eMetaphysical properties are based on traditional beliefs and are provided for cultural and informational purposes; they are not scientifically established or intended as medical advice.\u003c\/em\u003e\u003c\/p\u003e\u003ch4\u003eWhy This Specimen?\u003c\/h4\u003e\u003cp\u003eThe polished white exposure creates a strong visual contrast with the rugged tan-brown exterior while preserving the character of the original rough material. Its upright presentation and protective display box make it an accessible locality specimen for a shelf or compact mineral cabinet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eExact specimen pictured.\u003c\/strong\u003e You will receive the exact specimen shown in the photographs.\u003c\/p\u003e","brand":"Mineral Treasury","offers":[{"title":"Default Title","offer_id":53289573450095,"sku":"MT-0001","price":25.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/7563\/6335\/files\/virgin-valley-rough-opal-front.jpg?v=1787782005","url":"https:\/\/mineraltreasury.com\/products\/rough-opal-with-polished-face-virgin-valley-nevada","provider":"Mineral Treasury","version":"1.0","type":"link"}