Moissanite vs Diamond: Honest Comparison for Engagement Rings

By sophia-rivera · May 31, 2026

Moissanite has become the most popular diamond alternative. Here's an honest breakdown.

Brilliance

Diamond (RI 2.42): classic white sparkle. Moissanite (RI 2.65): MORE brilliant with rainbow fire. Some love it; others find it "too sparkly."

Diamond: 10 Mohs. Moissanite: 9.25 Mohs. Both last a lifetime for daily wear.

Diamond (1ct, good quality): $4,000-$8,000. Moissanite (1ct equivalent): $300-$600. That's 85-95% cheaper.

Diamond: mining has environmental impact (lab-grown solves this). Moissanite: always lab-created, no ethical concerns.

Diamond: 25-50% retention. Moissanite: 5-15%. Neither is a good "investment."

Couples wanting larger stones on smaller budgets, those prioritizing ethics, anyone who loves rainbow sparkle.

Those valuing tradition, partners who specifically want a diamond, those wanting better resale value.