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2. Synthetic diamond - Wikipedia

   en.wikipedia.org/wiki/Synthetic_diamond

   Lab-grown diamonds of various colors grown by the high-pressure-and-temperature technique. A synthetic diamond or laboratory-grown diamond (LGD), also called a lab-grown diamond, [1] laboratory-created, man-made, artisan-created, artificial, synthetic, or cultured diamond, is a diamond that is produced in a controlled technological process (in contrast to naturally formed diamond, which is ...

3. Gemstone - Wikipedia

   en.wikipedia.org/wiki/Gemstone

   Cultured, synthetic, or "lab-created" gemstones are not imitations: The bulk mineral and trace coloring elements are the same in both. For example, diamonds , rubies , sapphires , and emeralds have been manufactured in labs that possess chemical and physical characteristics identical to the naturally occurring variety.

4. Verneuil method - Wikipedia

   en.wikipedia.org/wiki/Verneuil_method

   However, the Verneuil process could also be used for the production of other stones, including blue sapphire, which required oxides of iron and titanium to be used in place of chromium oxide, as well as more elaborate ones, such as star sapphires, where titania (titanium dioxide) was added and the boule was kept in the heat longer, allowing ...

5. Are Lab-Grown Diamond Engagement Rings the Real Deal ... - AOL

   www.aol.com/lab-grown-diamond-engagement-rings...

   Plus: whether or not you should buy a lab-grown diamond engagement ring. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ways to reach us. Sign in ...

6. Sapphire - Wikipedia

   en.wikipedia.org/wiki/Sapphire

   Main sapphire-producing countries. Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α-Al 2 O 3) with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon.

7. Are lab-grown diamonds 'worthless'? Experts weigh in as ... - AOL

   www.aol.com/news/lab-grown-diamonds-worthless...

   The key difference between lab-grown and natural diamonds is their origins: Natural diamonds take billions of years to form, and lab-grown diamonds can be created in a matter of weeks.