Moissanite and diamond are different gemstones with different optical properties, compositions, prices, and sourcing paths. Both can be durable choices for engagement rings when properly cut and set.

Composition

Diamond is crystalline carbon. Moissanite is silicon carbide and is usually created in a laboratory for jewelry use.

Appearance

Diamond generally shows more white-light brilliance, while moissanite often displays stronger rainbow fire. Cut quality, stone size, lighting, and shape influence how noticeable the difference appears.

Durability

Both are suitable for frequent wear. Diamond ranks higher in hardness, while moissanite is also highly resistant to scratching. Neither stone is impossible to chip or damage.

Price and priorities

Moissanite usually provides greater face-up size for the budget. The better choice depends on whether the buyer prioritizes gemstone identity, optical character, size, price, rarity, or tradition.