雅虎香港 搜尋

  1. 旅行保險 相關

    廣告
  2. 旅遊保即買即生效,保障出發前不論任何原因而導致旅程取消或更改日期而無法退回的機票及酒店費用. 為家人提供海外醫療費用保障達150萬港元,涵蓋回港覆診之中醫跌打、針灸、物理治療或脊椎治療

  3. 上個月有 超過 100 萬 名用戶曾瀏覽 agoda.com

    立即預訂可慳更多,Agoda®一直保證最低價! 我們全天候為你提供協助,出走都唔會注定一人!

搜尋結果

  1. 2019年6月27日 · Roselle Jewelry不需花費更多就能實現你的想要備受呵護的小小嬌俏的女人心。. 網站: https://rosellejewelry.com. 店鋪地址:銅鑼灣怡和街22號2001室(3520 4882). 尖沙咀厚福街3號華博商業大廈2樓206(3705 3154). Roselle Jewelry, RZ人造鑽石. 十個選購Roselle Jewelry的理由 你還在 ...

  2. 2024年4月8日 · English 繁體中文 Deutsch français 한국어 日本語 русский 简体中文

  3. 2024年4月17日 · 網站列出了全部鑽石價錢💰,供客人自助選購🛒 請到以下鏈結選購其他尺寸裸石及觀看鑽石影片:⬇ ⬇ https://rosellejewelry.com/pages/lab-grown 只需幾個步驟便可以找到心目中理想的培育鑽石。 價格只是天然的25%起,與天然鑽石分別? 當然是價格更化算,商品更環保,也不怕買到血鑽。 Are you looking for lab-grown diamond?

  4. 2023年10月17日 · English 繁體中文 Deutsch français 한국어 日本語 русский 简体中文

    • 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...

  5. 2023年12月20日 · English 繁體中文 Deutsch français 한국어 日本語 русский 简体中文

  6. 2022年5月30日 · 實驗室培育鑽石與天然鑽石有區別嗎? 當然,有。 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。 鑽石本身是由於極端壓力和高溫而形成的。 然後它通過火山噴發被帶到地表,並位於被稱為“金伯利岩管”的火山岩層中。 然後,鑽石耐心等待專業採礦工程師開採。 根據維基百科,採礦工程是一門將科學技術應用於從地球上提取礦物的工程學科。 2. 天然地球開采的鑽石由什麼材料製成: 好的,所以我們知道鑽石是如何形成的,但真正的天然鑽石的內部是什麼? 根據 FTC(聯邦貿易委員會)的說法,鑽石的材料由在等軸立方系統中結晶的純碳組成。

  1. 其他人也搜尋了