{"id":4798,"date":"2021-10-20T11:26:56","date_gmt":"2021-10-20T03:26:56","guid":{"rendered":"https:\/\/jiehonggem.com\/?post_type=product&#038;p=4798"},"modified":"2021-10-20T15:05:56","modified_gmt":"2021-10-20T07:05:56","slug":"mbko0508","status":"publish","type":"product","link":"https:\/\/jiehonggem.com\/shop\/mbko0508\/","title":{"rendered":"MBKO0508&#038;"},"content":{"rendered":"<h1>Black Onyx<\/h1>\n<ul>\n<li><span style=\"font-weight: 400;\">chalcedony (kal-SED-uh-<\/span><span style=\"font-weight: 400;\">nee) is microcrystalline or cryptocrystalline quartz; hexagonal (trigonal) crystal system; chemical composition SiO2<\/span><\/li>\n<li><span style=\"font-weight: 400;\">semitransparent to opaque <\/span><\/li>\n<li>solid black, no banded, milky chalcedony with dyed treatment<\/li>\n<\/ul>\n<h2>Identification<\/h2>\n<ul>\n<li>Optic Character: <span style=\"font-weight: 400;\">AGG<\/span><\/li>\n<li>Refractive Index: <span style=\"font-weight: 400;\">1.535-1.539; 1.53 or 1.54 spot reading<\/span><\/li>\n<li>Birefringence: <span style=\"font-weight: 400;\">usually not detectable, but may show .004<\/span><\/li>\n<li>Pleochroism:<span style=\"font-weight: 400;\"> none\u00a0<\/span><\/li>\n<li>Ultraviolet Fluorescence: <span style=\"font-weight: 400;\">generally inert (LW and SW); some may fluoresce a <\/span><span style=\"font-weight: 400;\">yellowish green (LW and SW)<\/span><\/li>\n<li>Absorption Spectra: <span style=\"font-weight: 400;\">dyed green &#8211; vague lines around 645 and 670 nm<\/span><\/li>\n<li>Specific Gravity: <span style=\"font-weight: 400;\">2.60 (+.10,-.05)<\/span><span style=\"color: #555555;\">\u00a0<\/span><\/li>\n<li>Polish Luster:<span style=\"font-weight: 400;\"> greasy to vitreous<\/span><\/li>\n<li>Fracture:<span style=\"font-weight: 400;\"> conchoidal; sometimes granular<\/span><\/li>\n<li>Luster: <span style=\"font-weight: 400;\">dull to waxy<\/span><\/li>\n<li>Cleavage:<span style=\"font-weight: 400;\"> none<\/span><\/li>\n<li>Identifying Characteristics: <span style=\"font-weight: 400;\">dyed green and dyed blue appear red or pinkish through <\/span><span style=\"font-weight: 400;\">Chelsea filter<\/span><\/li>\n<li><span style=\"color: #555555;\">Crystal Habit: <\/span><span style=\"font-weight: 400;\">aggregate, often in botryoidal forms<\/span><\/li>\n<li>Hardness:6 \u00bd\u00a0 to 7<\/li>\n<li>Toughness: good<\/li>\n<\/ul>\n<h2>Enhancements<\/h2>\n<ul>\n<li>Method: dyeing<\/li>\n<\/ul>\n<p>Effect: chalcedony is dyed to practically all colors for various uses; the bands in agate and Onyx accept dye differently so that a green dye, for example, may impart color to some layers and leave others white.<br \/>\nPrevalence: common<br \/>\nDetection: appearance (color often looks unnatural), spectrum, Chelsea filter reaction, SG (dyed green often lower (2.60 or less) than chrysoprase)<br \/>\nStability: generally stable<br \/>\nSpecial Care Instructions: none<\/p>\n<p>&nbsp;<\/p>\n<p>Sources: Brazil, Uruguay<b><br \/>\n<\/b><\/p>\n<p>&nbsp;<\/p>\n<h4><b>Stone information is reference from<\/b><\/h4>\n<p><span style=\"font-weight: 400;\">Gem Reference Guide, Published by GIA. ISBN 0-87311-019-6<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gemstones of the World, Published by Sterling Publishing Co., Inc NY, ISBN 1-4027-4016-6<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Encyclopedia of GEMSTONE, Published by ISHINSHA CO., LTD. ISBN 978-986-251-831-1<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Black Onyx 8mm x 16\u2033 (MBKO0508&amp;)<br \/>\nHole 0.8 mm, approximately 37 beads.<\/p>\n","protected":false},"featured_media":4800,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[197],"product_tag":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/product\/4798"}],"collection":[{"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/comments?post=4798"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/media\/4800"}],"wp:attachment":[{"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/media?parent=4798"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/product_cat?post=4798"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/jiehonggem.com\/wp-json\/wp\/v2\/product_tag?post=4798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}