Why Does My D20 Have a Mysterious Stain? - Critter Realm

August 3, 2026 · Critter Realm

Unusual Dice Marks Spark Tabletop Curiosity Online

Why Does My D20 Have a Mysterious Stain? is pigment from unfinished resin or mineral traces left during casting. These spots are common, harmless, and often fade with handling and cleaning.

How Resin and Storage Create Patterns

Stains appear when plastic absorbs oils or color from dice trees and storage boxes. Studies indicate environmental factors like humidity and UV exposure deepen or lighten these marks over time.

From Fact to Tabletop Ritual

Players sometimes read markings as lucky signs or campaign symbols. Research shows routine rolling slowly wears patches down, blending them into the dice surface.

Keep dice dry and clean to reduce new marks.


Can a Mysterious Stain Harm My Game?

No. These marks are cosmetic and do not affect dice balance.

Will Cleaning Remove the Stain Permanently?

Mild soap and water help; some ingrained stains may remain. Harsh chemicals can damage plastic.

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