There are many diamond imitations, some convincing. What works and what doesn't.
Home tests — breath, water, scratch are unreliable; a thermal tester beats glass and CZ but not moissanite. ## Imitations — cubic zirconia (soft, clouds over) and moissanite (very diamond-like, fools simple testers; shows doubling). ## Natural vs lab-grown — both are real diamond; only a lab can tell them apart.
Frequently asked questions
Can I verify a diamond at home?+
Not reliably — a thermal tester cannot separate diamond from moissanite. A gemologist is needed.