{"product_id":"chelsea-filter-emerald-gem-identification","title":"Chelsea Filter","description":"\u003cp\u003eThe Chelsea filter is a compact gemological tool used to help identify certain red, blue, and green gemstones by observing characteristic color reactions under filtered light. It is especially useful for spotting imitations mixed into colored stone parcels and jewelry, and for differentiating emerald from common emerald look-alikes.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAssists in identifying select red, blue, and green gemstones\u003c\/li\u003e\n\u003cli\u003eCommonly used to detect simulants in colored stone parcels\u003c\/li\u003e\n\u003cli\u003eHelps differentiate emerald from emerald look-alikes\u003c\/li\u003e\n\u003cli\u003eUseful for checking aquamarine and sapphires\u003c\/li\u003e\n\u003cli\u003eCompact and easy to use in bench or field settings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eInstrument Type\u003c\/th\u003e\n\u003ctd\u003eColor Filter for Gem Testing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eUse under appropriate lighting conditions for best results. A Chelsea filter is a screening tool and should be used in combination with other gemological instruments for more conclusive identification.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581438591190,"sku":"161.175","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/161.175NEW_thumb_cb46a34a-529b-4706-a51a-d73da2c6529b.jpg?v=1764026900","url":"https:\/\/www.ottofrei.com\/products\/chelsea-filter-emerald-gem-identification","provider":"Otto Frei","version":"1.0","type":"link"}