Is this mold? On the bathroom mirror frame. Wasn't sure since it's

4 Solutions for Dark Spots on Vintage Mirrors - A Beautiful Mess

Wisfor 47 in. W x 24 in. H Large Rectangular Frameless LED Light Anti-Fog Wall Bathroom Vanity Mirror Dual Front Light &Backlit MR-C1260 - The Home Depot

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Home Decorators Collection 60 in. W x 31 in. H Rectangular Wood Framed Wall Bathroom Vanity Mirror in Walnut CDNM3160 - The Home Depot

Mirror Frame Silicone Mold for Jewelry Making

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Bathroom mirror when wall is short due to slanted ceiling? : r/HomeDecorating

Why Designers Hate Most Medicine Cabinets (+ Some Genius Alternative Bathroom Storage Solutions) - Emily Henderson

WallBeyond 2 Pack 24 x 36 Inch Wood Wall Mirror for Bathroom with Wood Frame Rounded Corner Arch Wall Mirror Sets for Entryway, Living Room or Bedroom Home Decor (Horizontal/Vertical)