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Hace 4 días · Topaz is allochromatic, which means that its color is caused by impurity elements or defects in its crystal structure rather than by an element of its basic chemical composition. The element chromium causes natural pink, red, and violet-to-purple colors in topaz. Imperfections at the atomic level in topaz crystal structure can cause yellow ...
Hace 2 días · Certified Quality: Lab-grown diamonds come with certifications from reputable gemological labs such as the Gemological Institute of America (GIA) and the International Gemological Institute (IGI). These certifications guarantee the diamond’s quality and authenticity, providing a sense of trust.
Hace 3 días · Finding an 825 stamp on gold jewelry means that the gold jewelry in question includes 82.5 percent pure gold and 17.5 percent of some other precious metal. Gold marked with an 825 stamp is about equivalent to 19 karat gold. The different metals used within the gold can vary, but popular options include: Silver. Copper.
Hace 4 días · May 26, 2024 | Leah Meirovich. A new organization dedicated to creating a unified ecosystem within the lab-grown diamond industry intends to bring together growers, manufacturers and retailers. The Grown Diamond Trade Organization ( GDTO) will “revolutionize” the synthetics segment by presenting a “single voice” to consumers, it said ...
Hace 2 días · The most reputable laboratories include the Gemological Institute of America (GIA), American Gem Society (AGS), and International Gemological Institute (IGI). These labs are renowned for their stringent grading standards and consistency.
Hace 2 días · Recently, the authors received a garnet sample originating from Thac Ba Lake in the Yen Bai province of Vietnam, obtained by a local miner. The 3.57 ct polished gem was pinkish white and reddish brown, translucent to opaque, and measured 7.11 × 6.90 × 6.40 mm. The diamond-shaped pinkish white portions were surrounded by reddish brown color ...
