This is unheated Imperial Topaz. A beautiful non-heating OH type with good luster and transparency. The color is a sherry-like clear orange with a soft pink color on both sides. If you look at it with a 10x magnifying glass, you can see some inclusions and cracks, but I don't think you'll notice them because the colors are beautiful. (The last two photos were taken with a dichroic mirror.)
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◉ We try to make the colors of the posted photos as close as possible to the actual colors, but due to differences in your environment (monitor, browser, etc.), the appearance of the colors may differ slightly from the actual ones. Thank you for your understanding.