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2020年12月14日 · 乍看之下，未經訓練的眼睛很難分辨出白金和純銀之間的區別。它們都是銀色，但是兩種金屬的外觀不同。 這是您在尋找銀色珠寶時需要知道的。 什麼是白金？ 白金是純金和其他金屬的混合物，這使金屬更堅硬，呈現白色外觀。通常，用於白金的金屬是鎳，銀或鈀，並且白金的性質隨所使用的合金 ...
在近期爆發期間，許多人對感染控制持謹慎態度。 謠言在社會上流傳。 香港大學護理學院的一群師生希望幫助公眾將事實與小說一一區分開。 視頻下載： http : //bit.ly/3bfqN5j. 【抗流行病小貼士問答第二集】 洗澡/淋浴時應該打開排氣扇嗎？ 回家後我的夾克怎麼辦？ 香港大學護理學院的一群師生繼續揭露一些家庭清潔和公眾日常生活中的神話。 視頻下載： http : //bit.ly/39gZx56. 【心理健康諮詢】 在流行病繼續爆發的同時，人們往往呆在家裡。 這可能會對一個人的心理健康造成負面影響。 面對流行病時，您可能會感覺到：－. 恐懼：即使您咳嗽一兩次也就認為自己被感染了。 ⠀－. 困惑：回家後我可以洗手並消毒嗎？ －擔心：您每天要檢查庫存的口罩數量，擔心口罩數量不足。
- How Are Lab-Created Diamonds Made?
- Lab Grown Diamond Benefits
- What Colors Are available?
Each laboratory-created diamond is grown by placing a diamond ‘seed’ into a chamber of heat and pressure. This chamber mimics the natural growing process. Crystallization occurs allowing the lab-grown diamond to mature within six to ten weeks. It is then cut, polished and graded by the same world-renowned labs that certify earth-mined diamonds. The...
UNMATCHED BEAUTY
Our collection of lab-created diamonds are available up to IF in clarity, D in color, Ideal in cut, and up to 10 carats in size. They come in a variety of shapesincluding round, rose, emerald, cushion, oval, oval rose, heart, princess, trillion, and radiant. Colors include white, yellow, blue, pink, and green.
UNRIVALED QUALITY
Unlike other retailers, every Rooselle Jewelry lab-created diamond is Type IIa, the purest form of diamond. They are harder and more brilliant than Type Ia diamonds. Only 2% of earth-mined diamonds are of this quality. Furthermore, each diamond is graded and certified by the same leading independent gemological labs that are used to grade earth-mined diamonds.
UNBEATABLE VALUE
Lab-created diamonds cost up-to 40% less than their mined diamond equivalents. Buyers beware: keep an eye out for "grown diamonds" sold for a few hundred dollars per carat. If the deal seems too good to be true, it probably is. Only diamond simulantsfall in this price range.
WHITE LAB-CREATED DIAMONDS
A pure carbon diamond with no impurities will grade as a colorless diamond. However, the majority of both mined and lab-created diamonds contain impurities, most of which are nitrogen. The nitrogen atoms within the diamond lattice create the yellow tint. In cases of fancy colored diamonds, a pure yellow color is created. Nearly all diamonds, both mined and lab-created, start out as yellow diamonds. Over the span of millions of years and exposure to pressure and heat, mined diamonds split the...
YELLOW LAB-CREATED DIAMONDS
Roselle Jewelry’s yellow lab-created diamonds are optically, chemically and physically identical to yellow earth-mined diamonds, but are offered free of conflict and on average 10% of the cost. They are available in a color range from fancy yellow to fancy vivid yellow, in sizes up to 2.0 carats and a variety of shapes. Both mined and lab-created yellow diamonds get their color from nitrogen. While diamonds are made up of carbon, impurities within the stone exist. It is the introduction of th...
BLUE LAB-CREATED DIAMONDS
Blue lab-created diamonds are optically, chemically and physically identical to blue earth-mined diamonds and are offered free of conflict and about 10% of the cost. They are typically offered in sizes smaller than 1.50 carats and come in a color range of fancy light blue to fancy intense blue. Both mined and lab-created blue diamonds get their color from boron. While diamonds are made up of carbon, impurities within the stone exist. It is the introduction of these impurities, in this case bo...
2022年5月30日 · 但你怎麼知道？ 數十年的研究和技術進步現在使這項艱鉅的任務變得更加容易，並且系統每天都在改進。 1. 天然地球開采的鑽石是如何形成的 鑽石的存在時間幾乎與地球一樣長。 一顆天然來源的鑽石在地球表面深處形成了數十億年。
2022年8月2日 · 2022年8月2日. 在 新文章 0 comments. 讓我們仔細看看影響鑽石切工質量的兩個因素， 鑽石的台面和深度 。 它們都有助於定義鑽石的物理形狀並有助於其閃耀，創造出我們都喜歡的令人眼花繚亂的外觀。 當這兩個特徵比例恰到好處時， 任何尺寸的鑽石 看起來會很壯觀。 什麼是鑽石台面？ 您是否注意到幾乎每顆鑽石的頂部都有一個扁平的方形刻面？ 這個平面稱為台面，它對鑽石的外觀起著至關重要的作用。 當光線通過時，桌子會折射光線，將它們引導到使鑽石看起來如此閃亮的刻面 。 重要的是要注意，在台面上，越大並不總是越好。 如果鑽石上的台面太大，表冠上的刻面就沒有空間分散光線。 如果桌子太小，則不會有太多光線進入石頭，從而降低其整體光彩。 檯面的物理尺寸自然會根據鑽石的整體尺寸而變化。
2022年8月2日 · 讓我們仔細看看影響鑽石切工質量的兩個因素，鑽石的台面和深度。它們都有助於定義鑽石的物理形狀並有助於其閃耀，創造出我們都喜歡的令人眼花繚亂的外觀
近期爆発期間中、許多人對感染制御持謹慎謹慎。謠言在社會上流傳。香港大學護理學院的一群師生希望幫助公眾將事實與小說一區分開。 視頻下載： http : //bit.ly/3bfqN5j 【抗流行病小貼士問答第二集】 洗澡/孤独浴時その打開排氣扇嗎?回家後我的夾克怎麼辦?
