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hard, ultra durable material like sapphire is needed.  But how do you make giant, flat sheets of sapphire?  Normally you'd cut windows out of a big round boule grown by HEM or \u003cspan class=\"ZNx93QP1XNrBdT5MI6SY\"\u003e\u003cspan class=\"expandableItem\"\u003eKyropoulos \u003c\/span\u003e\u003c\/span\u003ebut the shape really isn't conducive to larger flat shapes.\u003c\/p\u003e\n\u003cp\u003eTo solve this problem Rubicon, at the time one of America's greatest sapphire growing companies, got a 5 million dollar grant to develop the LANCE furnace, an ultra high tech crystal growing machine that grows the world's largest flat sapphires via the \"boat\" method aka HDSM.  If you've ever been to a Quiznos think of the ovens with a conveyer belt they use to toast subs evenly--it's basically that but with a giant flat pan of molten, crystallizing sapphire.\u003c\/p\u003e\n\u003cp\u003eThough the LANCE is absolutely incredible (we got to see it in person and meet the head crystal grower!!) it didn't have a 100% success rate, and over time the company built up a pile of defective sapphire crystals that had either been contaminated with titanium (which turns them pink and ruins UV transmission), developed bubbles, shattered during growth or usually all three.  They recently closed their factory in Chicago and auctioned off the contents, and we were able to buy the entire pile of defective crystals!  It was a dream come true!\u003cbr\u003e\u003cbr\u003e\u003cspan\u003e1023\u003c\/span\u003e\u003c\/p\u003e","brand":"Turtle's Hoard","offers":[{"title":"2mm Round Cut avg. 0.03ct","offer_id":51131395178784,"sku":null,"price":10.0,"currency_code":"USD","in_stock":false},{"title":"2.5mm Round Cut avg. 0.07ct","offer_id":51131411628320,"sku":"Gem_F35_Round_2.5","price":11.0,"currency_code":"USD","in_stock":true},{"title":"3mm Round Cut avg. 0.14ct","offer_id":51131416641824,"sku":"Gem_F35_Round_3","price":13.0,"currency_code":"USD","in_stock":true},{"title":"3.5mm Round Cut avg. 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