{"id":60615,"date":"2024-01-05T10:30:00","date_gmt":"2024-01-05T02:30:00","guid":{"rendered":"https:\/\/honwaygroup.com\/the-light-of-chatoyancy-chrysoberyl\/"},"modified":"2025-05-15T09:30:41","modified_gmt":"2025-05-15T01:30:41","slug":"the-light-of-chatoyancy-chrysoberyl","status":"publish","type":"post","link":"https:\/\/honwaygroup.com\/en\/the-light-of-chatoyancy-chrysoberyl\/","title":{"rendered":"The Light of Chatoyancy\u2014\u2014Chrysoberyl"},"content":{"rendered":"\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><nav><ul><li class=\"\"><a href=\"#%E4%BB%8B%E7%B4%B9\">Introduction to Chrysoberyl<\/a><\/li><li class=\"\"><a href=\"#%E9%87%91%E7%B6%A0%E5%AF%B6%E7%9F%B3-chrysoberyl\">Structure of Chrysoberyl<\/a><\/li><li class=\"\"><a href=\"#%E9%87%91%E7%B6%A0%E5%AF%B6%E7%9F%B3%E5%95%86%E6%A5%AD%E5%83%B9%E5%80%BC\">Commercial Value of Chrysoberyl<\/a><\/li><\/ul><\/nav><\/div>\n\n<h3 class=\"wp-block-heading\" id=\"&#x4ECB;&#x7D39;\"><strong>Introduction<\/strong><\/h3>\n\n<p>The term &#8220;cat&#8217;s eye&#8221; refers to gemstones that exhibit the chatoyancy effect. In fact, gemstones such as jade, quartz, beryl, tourmaline, apatite, sillimanite, scapolite, and diopside can also show the cat&#8217;s eye effect. However, by convention, only chrysoberyl cat&#8217;s eye is referred to solely as &#8220;cat&#8217;s eye.&#8221; For other gemstones, the specific type must be included in the name (e.g., quartz cat&#8217;s eye).<\/p>\n\n<p><\/p>\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-block-column-is-layout-flow\">\n<figure class=\"wp-block-image alignwide size-full\"><a href=\"https:\/\/honwaygroup.com\/wp-content\/uploads\/2023\/12\/20240105_&#x91D1;&#x7DA0;&#x5BF6;&#x77F3;-edited.webp\"><img decoding=\"async\" src=\"https:\/\/honwaygroup.com\/wp-content\/uploads\/2023\/12\/20240105_&#x91D1;&#x7DA0;&#x5BF6;&#x77F3;-edited.webp\" alt=\"Chrysoberyl\" class=\"wp-image-38320\"\/><\/a><figcaption class=\"wp-element-caption\">Chrysoberyl<\/figcaption><\/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=\"&#x91D1;&#x7DA0;&#x5BF6;&#x77F3;-chrysoberyl\"><strong><a href=\"https:\/\/www.google.com\/search?sca_esv=5f295d922f4ac677&amp;sca_upv=1&amp;q=Chrysoberyl&amp;udm=2&amp;fbs=AEQNm0AaBOazvTRM_Uafu9eNJJzC3QMRKTS5UIeA1ZwBo3sfI5STBA5pr7fqo2I_v__3YVGutX-70hIyezlJk563FvnaANll79LmO8NDYO9Lkpjx2The5iuQaOyJHx4O_Fyzp0DQNEjqPzGexXVkjQVznkozVrB0JCUsS5dbHbfEpeh2LLGIV7QHN6o1xOAtozZF63Xrk5ai&amp;sa=X&amp;sqi=2&amp;ved=2ahUKEwjJ1p2IouSGAxVdnK8BHY4xE2kQtKgLegQIChAB&amp;biw=1536&amp;bih=695&amp;dpr=1.25\" rel=\"nofollow noopener\" target=\"_blank\">Chrysoberyl<\/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: 8.5<\/li>\n\n\n\n<li style=\"line-height:2\">Specific gravity: 3.71<\/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, opaque, translucent<\/li>\n\n\n\n<li style=\"line-height:2\">Color: red-brown, yellow-green, golden yellow<\/li>\n\n\n\n<li style=\"line-height:2\">Refractive index: 1.74~1.75<\/li>\n\n\n\n<li style=\"line-height:2\">Birefringence: 0.009<\/li>\n\n\n\n<li style=\"line-height:2\">Fluorescence: None.<\/li>\n\n\n\n<li style=\"line-height:2\">Cleavage: incomplete, columnar<\/li>\n\n\n\n<li style=\"line-height:2\">Characteristics: high hardness, discoloration effect<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n<h3 class=\"wp-block-heading\" id=\"&#x91D1;&#x7DA0;&#x5BF6;&#x77F3;&#x5546;&#x696D;&#x50F9;&#x503C;\"><strong>Commercial Value of Chrysoberyl<\/strong><\/h3>\n\n<p>Chrysoberyl typically exhibits a vitreous to subadamantine luster, with colors ranging from golden yellow to yellow-green, and even brownish-yellow. The yellow hue primarily comes from iron ions, while the presence of trace amounts of chromium can induce a color change effect. Chrysoberyl with this color-changing property is known as alexandrite, a rare and valuable gemstone. Alexandrite is famous for its striking color shift between green in daylight and red under incandescent light, which is the source of its name.<\/p>\n\n<p>Chrysoberyl cat&#8217;s eye gemstones are most prized in deep yellowish-brown to honey-yellow colors. Typically, cat&#8217;s eye stones exhibit a white eye line, but if the eye line is golden, it is referred to in the industry as a &#8220;golden cat&#8217;s eye,&#8221; which is even rarer. When a gemstone displays both the cat&#8217;s eye effect and a color-changing phenomenon, it becomes the ultimate collector\u2019s item, known as an &#8220;alexandrite cat&#8217;s eye.&#8221; Such gems are frequent stars in international jewelry auctions. The grading of alexandrite is primarily based on the degree and intensity of its color-change effect. The most valuable are those with a dramatic shift from bluish-green to purplish-red, typically sourced from Russia, while those from Sri Lanka exhibit a green-to-brownish-red color change.<\/p>\n\n<p>The best way to observe the cat&#8217;s eye effect is by shining a penlight on the gemstone to check if its eye line meets the &#8220;straight, bright, sharp, fine, and active&#8221; criteria. If more than one light source is used simultaneously, the cat&#8217;s eye stone may display multiple eye lines. High-quality chrysoberyl cat&#8217;s eyes can be just as valuable as rubies, sapphires, or emeralds.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The word Apatite comes from Greek, meaning &#8220;deception,&#8221; because the mineral&#8217;s appearance can resemble that of emerald, sapphire, aquamarine, or amethyst, leading to confusion.<\/p>\n<p>Apatite refers to a group of calcium phosphate minerals that contain either chlorine (Cl) or fluorine (F). The most common species is fluorapatite, followed by chlorapatite and hydroxylapatite. Apatite often contains rare earth elements like cerium (Ce), uranium (U), and thorium (Th), which can impart a wide range of colors, including colorless, yellow, blue, purple, green, brown, and white. Some apatite specimens exhibit phosphorescence, meaning they continue to glow after exposure to UV light. Additionally, apatite has strong pleochroism, where the color changes when viewed from different angles. However, due to its lower hardness, apatite is not as widely sought after in the jewelry market.<\/p>\n<p>Apatite is found in igneous, metamorphic, and sedimentary rocks. In igneous rocks, apatite occurs mainly in pegmatites or hydrothermal veins, with gemstone-quality apatite typically sourced from pegmatitic granite. In sedimentary rocks, apatite forms through exogenic processes and contributes to the creation of phosphorite, a rock rich in phosphate minerals. In metamorphic rocks, apatite is generally found as an accessory mineral. Gem-quality apatite is most often extracted from alluvial deposits.<br \/>\nCommercial Value of Apatite<\/p>\n<p>Apatite is easily confused with several common gemstones due to its appearance. Though it may be difficult to distinguish them with the naked eye, gemologists can easily identify apatite by examining its refractive index, birefringence, specific gravity, and clarity. However, it should be noted that apatite and tourmaline have similar refractive indices, requiring birefringence for differentiation. In the case of cabochon-cut stones, rather than faceted gems, distinguishing between the two becomes more challenging.<\/p>\n<p>Industrially<\/p>\n<p>About 90% of the phosphorus in nature comes from apatite, making apatite an important industrial mineral for extracting phosphorus. This element is widely used in various fields such as medical products, chemical products, textiles, clothing, inorganic products, and the removal of toxic substances. Its applications are quite extensive.<\/p>\n<p>Ornamentally<\/p>\n<p>Gem-quality cat&#8217;s eye apatite often contains parallel fibrous or tubular inclusions that easily create a chatoyancy effect in cabochon cuts. When selecting cat&#8217;s eye apatite, opt for visually flawless stones and vibrant colors like vivid blue-green (rainbow blue), which resembles Paraiba tourmaline, or intense green and royal blue. If these colors are combined with the cat&#8217;s eye effect, they are even more valuable and desirable.<\/p>\n<p>Brownish-yellow cat&#8217;s eye apatite closely resembles the coveted cat&#8217;s eye chrysoberyl, and it is common to find apatite varieties with a similar &#8220;honey color,&#8221; which is highly sought after in chrysoberyl.<\/p>\n<p>Though apatite lacks pronounced cleavage, making it relatively impact-resistant, its low hardness means it still requires careful handling to prevent scratching. Additionally, apatite is sensitive to acids, so it should not be exposed to acidic liquids or soaked in hot springs, as this could lead to potential dissolution.<\/p>\n","protected":false},"author":1,"featured_media":38322,"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":[2857],"class_list":["post-60615","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gemstones","tag-chrysoberyl"],"_links":{"self":[{"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/posts\/60615","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=60615"}],"version-history":[{"count":0,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/posts\/60615\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/media\/38322"}],"wp:attachment":[{"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/media?parent=60615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/categories?post=60615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/honwaygroup.com\/en\/wp-json\/wp\/v2\/tags?post=60615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}