{"id":38180,"date":"2019-11-04T01:01:28","date_gmt":"2019-11-04T09:01:28","guid":{"rendered":"https:\/\/www.bobswatches.com\/rolex-blog\/?p=38180"},"modified":"2023-07-03T13:52:59","modified_gmt":"2023-07-03T20:52:59","slug":"rolex-milgauss-green-sapphire-crystal","status":"publish","type":"post","link":"https:\/\/www.bobswatches.com\/rolex-blog\/watch-101\/rolex-milgauss-green-sapphire-crystal.html","title":{"rendered":"Rolex Milgauss and Its Green Sapphire Crystal"},"content":{"rendered":"<p>The green-tinted sapphire crystal fitted to the reference 116400GV Milgauss has quickly become one of the defining characteristics of Rolex&#8217;s anti-magnetic line of watches. The <a title=\"Rolex Milgauss\" href=\"https:\/\/www.bobswatches.com\/rolex-milgauss-1.html\">Rolex Milgauss<\/a> was first introduced in 1956; however, it was not until 2007 that it received its now-signature, green sapphire crystal &#8211; an exclusive feature that was originally introduced as a way for Rolex to celebrate the 50th anniversary of their Milgauss line.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-34838 size-full\" title=\"Rolex Milgauss ref. 116400GV Z-Blue Dial\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/06\/Milgauss_116400GV_5D3_5270-3-Edit-copy.jpg\" alt=\"Rolex Milgauss 116400GV Z-Blue green crystal\" width=\"1440\" height=\"960\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/06\/Milgauss_116400GV_5D3_5270-3-Edit-copy.jpg 1440w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/06\/Milgauss_116400GV_5D3_5270-3-Edit-copy-300x200.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/06\/Milgauss_116400GV_5D3_5270-3-Edit-copy-768x512.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/06\/Milgauss_116400GV_5D3_5270-3-Edit-copy-1024x683.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/06\/Milgauss_116400GV_5D3_5270-3-Edit-copy-570x380.jpg 570w\" sizes=\"(max-width: 1440px) 100vw, 1440px\" \/><\/p>\n<h2>The Green Sapphire Crystal on the Rolex Milgauss<\/h2>\n<p>No other watch in Rolex\u2019s current catalog is fitted with a green-tinted (or any other color) sapphire crystal. However, at the present time, all Milgauss watches that are currently in production leave the factory with green sapphire crystals. Rather than simply being a layer or coating, the light green tint is present throughout the entire material of the crystal, and will not fade or discolor after prolonged wear and use.<\/p>\n<p>Rolex claims that it took them many years of research and development to master and perfect the secret procedure of manufacturing their green-tinted sapphire crystals and that the actual process of producing the crystals takes multiple weeks. What is most interesting is that despite a usual eagerness to patent their various in-house technologies, Rolex claims that the green sapphire crystal in the Milgauss is \u201cnot patented, as it is so difficult to make that no one else would even venture to try.\u201d<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-38182 size-full\" title=\"Rolex Milgauss ref. 116400GV 50th Anniversary \" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_3353-1.jpg\" alt=\"green sapphire Rolex Milgauss 116400GV 50th Anniversary \" width=\"1000\" height=\"667\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_3353-1.jpg 1000w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_3353-1-300x200.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_3353-1-768x512.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_3353-1-570x380.jpg 570w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>Rolex will never reveal their exact formulas and secrets about how they manufacture the green-tinted sapphire crystals fitted to the Milgauss;\u00a0however, we do know some general information about green-colored synthetic sapphire and the production of sapphire watch crystals as a whole.<\/p>\n<p>There are a number of different ways to produce synthetic sapphire, all of which fall into the following general methods of production: melt growth, solution growth, and high-temperature\/high-pressure growth. It is hypothesized that Rolex uses a hydrothermal method of production for its synthetic sapphire crystals, which is slow, expensive, and uses heat and pressure to imitate the conditions present deep inside the earth that is responsible for the production of naturally-occurring crystalline gemstones.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-36422 size-full\" title=\"Rolex Milgauss ref. 116400GV Z-Blue Dial\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/08\/Milgauss_116400GV_5D3_5259-2-Edit.jpg\" alt=\"green sapphire crystal Rolex Milgauss 116400GV Z-Blue Dial\" width=\"1440\" height=\"960\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/08\/Milgauss_116400GV_5D3_5259-2-Edit.jpg 1440w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/08\/Milgauss_116400GV_5D3_5259-2-Edit-300x200.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/08\/Milgauss_116400GV_5D3_5259-2-Edit-768x512.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/08\/Milgauss_116400GV_5D3_5259-2-Edit-1024x683.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/08\/Milgauss_116400GV_5D3_5259-2-Edit-570x380.jpg 570w\" sizes=\"(max-width: 1440px) 100vw, 1440px\" \/><\/p>\n<p>The chemical composition of synthetic green sapphire includes copper and aluminum oxide, with the copper being the element that is ultimately responsible for its signature green hue. The process of synthetic sapphire production is an expensive and exacting one; however, the additional obstacles that accompany the addition of copper &#8211;\u00a0and the precision required to achieve the right amount of green tint without compromising the strength or clarity of the crystal are likely responsible for its exclusive use on the Rolex Milgauss line of watches.<\/p>\n<p>When synthetic sapphire is manufactured, the material has to \u201cgrow\u201d over the course of a period of several weeks. Particles attract to one another, forming layers that fuse together to create a dense and ultra-hard substance. The end result of production is a \u201cboule\u201d &#8211; a solid piece of synthetic sapphire shaped like a chunky cylinder, which is then cut and shaped to its necessary dimensions.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-38183 size-full\" title=\"Rolex Milgauss ref. 116400GV 50th Anniversary \" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_6361-Edit.jpg\" alt=\"green crystal Rolex Milgauss 116400GV 50th Anniversary \" width=\"1000\" height=\"732\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_6361-Edit.jpg 1000w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_6361-Edit-300x220.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_6361-Edit-768x562.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2019\/10\/IMG_6361-Edit-519x380.jpg 519w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p>Due to the high costs of production, most watch crystal manufacturers cut their synthetic sapphire boules in a perpendicular fashion, as to maximize the number of crystals that can be created from a single boule. Although this is entirely unconfirmed, it is rumored that Rolex cuts the boule along a diagonal axis to maximize the clarity and strength of the finished crystal. In addition to complicating the cutting and shaping process itself, cutting the boule along a diagonal axis significantly increases the amount of waste, which further adds cost to an already expensive manufacturing process.<\/p>\n<p>Despite not making an appearance until just over ten years ago, the green sapphire crystal has quickly become one of the defining characteristics of the Milgauss line. Its pale green tint possesses no functional advantages over a traditional, clear\/uncolored synthetic sapphire crystal; however, the green crystal that is exclusively fitted to the <a href=\"https:\/\/www.bobswatches.com\/rolex\/milgauss-116400\">Rolex Milgauss 116400GV<\/a> is one of the primary reasons that individuals seek out this particular reference. The green crystal is something entirely unique to the Milgauss collection and is not something that is found on any other Rolex watch, past or present.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-17635 size-full\" title=\"Rolex Milgauss ref. 116400GV Z-Blue Dial\" src=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2.jpg\" alt=\"Rolex Milgauss 116400GV Z-Blue Dial\" width=\"3393\" height=\"3393\" srcset=\"https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2.jpg 3393w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2-250x250.jpg 250w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2-300x300.jpg 300w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2-768x768.jpg 768w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2-1024x1024.jpg 1024w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2-140x140.jpg 140w, https:\/\/www.bobswatches.com\/rolex-blog\/wp-content\/uploads\/2017\/08\/Rolex_Milgauss_116400-5D3_3741-Edit-2-380x380.jpg 380w\" sizes=\"(max-width: 3393px) 100vw, 3393px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The green-tinted sapphire crystal fitted to the reference 116400GV Milgauss has quickly become one of the defining characteristics of Rolex&#8217;s [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":34838,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"ep_exclude_from_search":false,"footnotes":""},"categories":[2275],"tags":[],"ppma_author":[2297],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Rolex Milgauss and Its Green Sapphire Crystal - Bob&#039;s Watches<\/title>\n<meta name=\"description\" content=\"Possibly the most unusual aspect about the Rolex Milgauss is its green-tinted sapphire crystal. 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As a Los Angeles native with an interest in all things mechanical, Ripley has had a love for watches since a young age, when his mother gave him a children's Swatch to help teach him how to read the time. While most of his days are now occupied by the world of vintage and luxury timepieces, Ripley can often be found exploring the United States National Parks or running and hiking outside with his dog, Ziggy.\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Rolex Milgauss and Its Green Sapphire Crystal - Bob&#039;s Watches","description":"Possibly the most unusual aspect about the Rolex Milgauss is its green-tinted sapphire crystal. 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