{"id":60458,"date":"2024-02-23T10:00:00","date_gmt":"2024-02-23T02:00:00","guid":{"rendered":"https:\/\/honwaygroup.com\/metamorphic-rock-companion-tanzanite\/"},"modified":"2024-10-25T15:25:23","modified_gmt":"2024-10-25T07:25:23","slug":"metamorphic-rock-companion-tanzanite","status":"publish","type":"post","link":"https:\/\/honwaygroup.com\/en\/metamorphic-rock-companion-tanzanite\/","title":{"rendered":"Metamorphic Rock Companion \u2013 Tanzanite"},"content":{"rendered":"\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#\u4ecb\u7d39\">Introduction<\/a><\/li><li><a href=\"#\u4e39\u6cc9\u77f3-tanzanite\">Tanzanite<\/a><\/li><li><a href=\"#\u4e39\u6cc9\u77f3\u5546\u696d\u50f9\u503c\">Commercial Value of Tanzanite<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u4ecb\u7d39\"><strong>Introduction<\/strong><\/h3>\n\n\n\n<p>Tanzanite, found alongside ruby in metamorphic rocks, first appeared in the gem market as carving material. Gem-quality blue tanzanite was discovered in 1967 in northern Tanzania, initially mistaken for sapphire by local tribespeople. Later, gemologists confirmed it to be a new variety of blue zoisite, eventually known as tanzanite. Before this discovery, most tanzanite was opaque green, used primarily for carvings. After the discovery of transparent blue tanzanite, Tiffany &amp; Co. began promoting the gemstone.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-columns alignfull is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-container-core-column-is-layout-f7a85e60 wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--80);padding-right:0;padding-bottom:var(--wp--preset--spacing--80);padding-left:0;font-size:0px;line-height:0\">\n<figure class=\"wp-block-image alignwide size-full\"><a href=\"https:\/\/honwaygroup.com\/wp-content\/uploads\/2024\/02\/20240223_\u4e39\u6cc9\u77f3.webp\"><img fetchpriority=\"high\" decoding=\"async\" width=\"788\" height=\"591\" src=\"https:\/\/honwaygroup.com\/wp-content\/uploads\/2024\/02\/20240223_\u4e39\u6cc9\u77f3.webp\" alt=\"Tanzanite\" class=\"wp-image-38543\" srcset=\"https:\/\/honwaygroup.com\/wp-content\/uploads\/2024\/02\/20240223_\u4e39\u6cc9\u77f3.webp 788w, https:\/\/honwaygroup.com\/wp-content\/uploads\/2024\/02\/20240223_\u4e39\u6cc9\u77f3-300x225.webp 300w, https:\/\/honwaygroup.com\/wp-content\/uploads\/2024\/02\/20240223_\u4e39\u6cc9\u77f3-768x576.webp 768w\" sizes=\"(max-width: 788px) 100vw, 788px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading has-text-align-center\" id=\"\u4e39\u6cc9\u77f3-tanzanite\"><strong><a href=\"https:\/\/www.google.com\/search?sca_esv=6a8e8a6372ddea43&amp;sca_upv=1&amp;q=Tanzanite&amp;udm=2&amp;fbs=AEQNm0AaBOazvTRM_Uafu9eNJJzC3QMRKTS5UIeA1ZwBo3sfI5STBA5pr7fqo2I_v__3YVGutX-70hIyezlJk563FvnaANll79LmO8NDYO9Lkpjx2The5iuQaOyJHx4O_Fyzp0DQNEjqPzGexXVkjQVznkozVrB0JCUsS5dbHbfEpeh2LLGIV7QHN6o1xOAtozZF63Xrk5ai&amp;sa=X&amp;sqi=2&amp;ved=2ahUKEwjdioaxw-SGAxXYpK8BHVe2BiUQtKgLegQIChAB&amp;biw=1536&amp;bih=695&amp;dpr=1.25\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Tanzanite<\/a><\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li style=\"line-height:2\">Crystal system: orthorhombic crystal system<\/li>\n\n\n\n<li style=\"line-height:2\">Hardness: 6.5<\/li>\n\n\n\n<li style=\"line-height:2\">Specific gravity: 3.35<\/li>\n\n\n\n<li style=\"line-height:2\">Luster: Vitreous luster<\/li>\n\n\n\n<li style=\"line-height:2\">Transparency: Transparent to opaque<\/li>\n\n\n\n<li style=\"line-height:2\">Color: pink, yellow, brown, green, blue<\/li>\n\n\n\n<li style=\"line-height:2\">Refractive index: 1.69~1.70<\/li>\n\n\n\n<li style=\"line-height:2\">Birefringence: 0.01<\/li>\n\n\n\n<li style=\"line-height:2\">Fluorescence: None.<\/li>\n\n\n\n<li style=\"line-height:2\">Cleavage: complete axial cleavage<\/li>\n\n\n\n<li style=\"line-height:2\">Characteristics: low dispersion, strong pleochroism<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"\u4e39\u6cc9\u77f3\u5546\u696d\u50f9\u503c\"><strong>Commercial Value of Tanzanite<\/strong><\/h3>\n\n\n\n<p>The finest tanzanite colors are vivid blue, resembling top-quality sapphires, or a saturated indigo. Bluish violet and violet tanzanite are less valuable. In short, the most desirable tanzanite color is pure blue, with minimal purple or green hues, and a rich, vibrant tone. Colors that are too light or grayish are less prized.<\/p>\n\n\n\n<p>Tanzanite&#8217;s color presentation is closely related to its cutting orientation. Due to its strong pleochroism, the cutting direction influences the face-up color of the gemstone. Ideally, the gem should be cut to show the pure blue hue, but this direction often results in more material loss. As a result, most tanzanite is cut to retain more weight, leading to bluish violet tones being more common, while deep blue tanzanite is rarer.<\/p>\n\n\n\n<p>Tanzanite began to appear in Taiwan\u2019s jewelry market around 1995. Its color, similar to top-grade blue sapphire, initially made it popular as a sapphire substitute. Tanzanite could be found at major jewelry shows and counters. At the time, a 10-carat, top-grade blue tanzanite would sell for around NT$10,000 to NT$15,000 per carat. Thanks to Tiffany\u2019s long-term promotion, tanzanite has since been redefined not as a sapphire substitute but as a rare and unique blue gemstone in its own right.<\/p>\n\n\n\n<figure class=\"wp-block-pullquote has-medium-font-size\"><blockquote><p>Follow Honway to learn more about the characteristics of gemstones~<\/p><\/blockquote><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Tanzanite was discovered in 1967 in northern Tanzania and was initially mistaken for sapphire before being recognized as a new gem. Gem-quality blue tanzanite was promoted by Tiffany &amp; Co., with deep blue and indigo hues being the most prized. Tanzanite exhibits strong pleochroism, meaning its color can vary depending on the cutting direction. In Taiwan, tanzanite entered the market around 1995, initially as a substitute for sapphire due to its similar color. Thanks to Tiffany&#8217;s efforts, tanzanite has since gained recognition as a unique and rare blue gemstone, with prices around NT$10,000 to NT$15,000 per carat.<\/p>\n","protected":false},"author":1,"featured_media":38545,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2251],"tags":[2842],"class_list":["post-60458","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gemstones","tag-tanzanite"],"_links":{"self":[{"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/posts\/60458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/comments?post=60458"}],"version-history":[{"count":0,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/posts\/60458\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/media\/38545"}],"wp:attachment":[{"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/media?parent=60458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/categories?post=60458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/tags?post=60458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}