{"product_id":"blue-sapphire-otz-2026-01644","title":"1.47 ct Unheated Yogo Sapphire — GIA Origin Report","description":"\u003cp\u003e\u003cstrong\u003eCollector's Note\u003c\/strong\u003e\u003cbr\u003eA rare American sapphire from Montana's famed Yogo Gulch, this 1.47 ct natural blue sapphire combines strong saturation and high transparency with the collector appeal of GIA-confirmed origin and no indications of heating. Faceted Yogo sapphires above one carat are notably scarce, making its size and locality the defining features of this stone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eGemstone Details\u003c\/strong\u003e\u003cbr\u003eGemstone: Natural Blue Sapphire\u003cbr\u003eSpecies: Corundum\u003cbr\u003eWeight: 1.47 ct\u003cbr\u003eShape \/ Cut: Oval Modified Brilliant Cut\u003cbr\u003eMeasurements: 7.10 × 6.46 × 3.61 mm\u003cbr\u003eColor: Blue\u003cbr\u003eTransparency: Transparent\u003cbr\u003eOrigin: USA (Yogo Gulch), Montana\u003cbr\u003eTreatment: No indications of heating\u003cbr\u003eCondition: Surface scratches and abrasions are present; professional repolishing is recommended.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eO50 Collector Evaluation\u003c\/strong\u003e\u003cbr\u003eOtzera 50: 36\/50 — Distinguished\u003cbr\u003eFace-Up Performance: 70%\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTreatment \u0026amp; Origin Disclosure\u003c\/strong\u003e\u003cbr\u003eGIA determined the geographic origin to be USA (Yogo Gulch) and reported no indications of heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLaboratory Documentation\u003c\/strong\u003e\u003cbr\u003eAccompanied by GIA Sapphire Origin Report No. 5221467846, dated June 8, 2022.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProvenance \/ Collector Significance\u003c\/strong\u003e\u003cbr\u003eYogo sapphires are prized for their highly specific Montana provenance and are typically encountered in small sizes. A faceted Yogo above one carat is particularly uncommon, giving this stone meaningful locality and size appeal for collectors of American gemstones.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCare \u0026amp; Setting\u003c\/strong\u003e\u003cbr\u003eSapphire is durable for jewelry wear, but this stone currently shows notable facet-surface wear. Professional repolishing is recommended before setting. If repolished, the stone should be reweighed and remeasured and its documentation reviewed for consistency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDigital Gem Passport\u003c\/strong\u003e\u003cbr\u003eAccompanied by an Otzera Digital Gem Passport preserving its identifying details, GIA documentation, treatment and origin disclosures, condition notes and O50 evaluation.\u003c\/p\u003e","brand":"Otzera","offers":[{"title":"Default Title","offer_id":51150481522935,"sku":"OTZ-2026-01644","price":9850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/9999\/6919\/files\/OTZ-2026-01644-yogo-sapphire-1.jpg?v=1789159424","url":"https:\/\/otzera.com\/products\/blue-sapphire-otz-2026-01644","provider":"Otzera","version":"1.0","type":"link"}