Topaz is a mineral that typically has a specific gravity ranging from 3.1 to 3.6, which means it is relatively dense compared to many other gemstones. The exact weight of a topaz gemstone can vary depending on its size and specific composition, but it is generally heavier than quartz and lighter than many other gemstones like sapphire or ruby. For example, a one-carat topaz weighs approximately 0.2 grams.
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