{"product_id":"marquise-faceted-imitation-amethyst-spinel-doublet","title":"Marquise Faceted Imitation Amethyst","description":"\u003cp\u003eThis marquise faceted imitation amethyst exhibits a light to medium purple color that mimics the rich hue of natural amethyst without its characteristic color zoning. Each stone is a synthetic spinel doublet — two layers of spinel bonded together with a tinted adhesive — making it an economical and consistent amethyst simulant ideal for jewelry production and resale.\u003c\/p\u003e\n\u003cp\u003eCalibrated gemstone sizes may vary slightly ±0.10mm. Clean with warm, soapy water only. Do not apply heat or expose to direct flame, as the adhesive bonding the doublet layers may be damaged.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmethyst simulant\u003c\/strong\u003e with light to medium purple color\u003c\/li\u003e\n\u003cli\u003eComposed of a \u003cstrong\u003esynthetic spinel doublet\u003c\/strong\u003e — two spinel layers bonded with tinted adhesive\u003c\/li\u003e\n\u003cli\u003eMimics the rich purple of amethyst \u003cstrong\u003ewithout color zoning\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMarquise (navette) faceted cut for classic brilliance\u003c\/li\u003e\n\u003cli\u003eCalibrated sizing for consistent use in production settings\u003c\/li\u003e\n\u003cli\u003eSuitable for resale applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eStone Type\u003c\/th\u003e\n\u003ctd\u003eImitation Amethyst (Amethyst Simulant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSynthetic Spinel Doublet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eLight to Medium Purple\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCut\u003c\/th\u003e\n\u003ctd\u003eMarquise Faceted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Tolerance\u003c\/th\u003e\n\u003ctd\u003e±0.10mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCare\u003c\/th\u003e\n\u003ctd\u003eWarm soapy water only; avoid heat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e917-207\u003c\/td\u003e\n\u003ctd\u003e4x2mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e917-216\u003c\/td\u003e\n\u003ctd\u003e6x3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e917-226\u003c\/td\u003e\n\u003ctd\u003e8x4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e917-238\u003c\/td\u003e\n\u003ctd\u003e10x5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e917-246\u003c\/td\u003e\n\u003ctd\u003e12x6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCalibrated sizes may vary slightly ±0.10mm from stated dimensions.\u003c\/li\u003e\n\u003cli\u003eDo not apply direct heat; the tinted adhesive bonding the doublet layers may be compromised by high temperatures or open flame.\u003c\/li\u003e\n\u003cli\u003eThis is an assembled, lab-created simulant — not a natural or single-crystal gemstone.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"4x2mm","offer_id":47551822430422,"sku":"917-207","price":1.59,"currency_code":"USD","in_stock":true},{"title":"6x3mm","offer_id":47551822463190,"sku":"917-216","price":3.33,"currency_code":"USD","in_stock":true},{"title":"8x4mm","offer_id":47551822495958,"sku":"917-226","price":3.99,"currency_code":"USD","in_stock":true},{"title":"10x5mm","offer_id":47551822528726,"sku":"917-238","price":5.78,"currency_code":"USD","in_stock":true},{"title":"12x6mm","offer_id":47551822561494,"sku":"917-246","price":7.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/marquise-faceted-imitation-amethyst-otto-frei.jpg?v=1719954568","url":"https:\/\/www.ottofrei.com\/products\/marquise-faceted-imitation-amethyst-spinel-doublet","provider":"Otto Frei","version":"1.0","type":"link"}