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Title: Synthetic Corundum Gemstones
Caption: Faceted oval gemstones cut from synthetic corundum. Pure corundum, aluminum oxide, is colorless, but small amounts of chemical impurities create myriad hues. The red variety of gem quality corundum has a specific name: ruby. All other gem corundums are termed sapphire. Massive, non-gem corundum is used as an abrasive. Corundum is produced synthetically in the laboratory by a variety of methods. The synthetic (man-made) material has optical and other properties nearly identical to natural corundum.
Credit: Album / Science Source / JOEL AREM
Image size: 3820 × 2550 px | 27.9 MB
Print size: 32.3 × 21.6 cm | 1503.9 × 1003.9 in (300 dpi)