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65
Mostly True

The text suggests breathing on a diamond checks its authenticity; condensation appears on fakes, not on diamonds.

The claims about diamond condensation tests are supported by multiple sources. Genuine diamonds will dissipate condensation quickly, while fake diamonds hold fog longer, indicating authenticity through this simple test.

May 18, 2026 Language: en 2 claims analyzed

Individual Claims

68
Mostly True Science
Breathing on a diamond will not cause condensation.
Evidence from sources such as Shreve and Blue Nile confirms that real diamonds will dissipate condensation quickly, and do not fog up like fake diamonds. Thus, condensation does occur but evaporates swiftly.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 70
Web Consensus Weight 50
Source Quality Score 70
Source Quality Weight 25
Llm Reasoning Score 60
Llm Reasoning Weight 25
Weighted Total 68
Evidence Summary 3 web sources confirm diamonds dissipate condensation quickly.
62
Mostly True Science
Condensation will appear on a fake diamond when breathed on.
Supporting evidence indicates that fake diamonds retain fog for longer periods, supporting the claim that condensation appears distinctly on fakes.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 65
Web Consensus Weight 50
Source Quality Score 60
Source Quality Weight 25
Llm Reasoning Score 60
Llm Reasoning Weight 25
Weighted Total 62
Evidence Summary 3 web sources indicate fake diamonds retain fog longer.

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