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Moissanite vs. Diamond: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Updated on December 25, 2023
Moissanite is a lab-created gem resembling diamond but is less expensive and has more brilliance; diamonds are natural, harder, and more valuable.
Moissanite vs. Diamond

Key Differences

Moissanite is composed of silicon carbide, a compound created in laboratories to mimic diamonds. Diamonds, on the other hand, are made of pure carbon and are naturally occurring, formed under high pressure and temperature conditions deep within the Earth.
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On the Mohs scale of mineral hardness, moissanite scores 9.25, making it very durable, but slightly less than diamonds, which are the hardest known mineral with a score of 10. This difference makes diamonds more resistant to scratches compared to moissanite.
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Moissanite is known for its high refractive index and displays more fire (rainbow-colored flashes) than diamonds. Diamonds, prized for their unmatched brilliance and sparkle, exhibit a different type of shine due to their unique light-reflecting properties.
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Moissanite is significantly less expensive than diamonds, making it a popular budget-friendly choice. Diamonds, with their rarity and cultural significance, often carry a higher price tag and are considered a symbol of luxury and status.
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Moissanite is lab-grown, ensuring ethical sourcing and minimal environmental impact. Diamonds, though now available as lab-created, traditionally come from mines, raising concerns about ethical sourcing and environmental impact.
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Comparison Chart

Composition

Silicon carbide
Pure carbon
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Natural or Synthetic

Lab-created
Naturally occurring
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Hardness (Mohs Scale)

9.25
10
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Brilliance and Fire

High refractive index, more fire
Unique brilliance, less fire
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Cost

Less expensive
More expensive
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Cultural Significance

Less traditional
Highly valued
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Environmental Impact

Minimal
Varies (mined vs lab-grown)
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Moissanite and Diamond Definitions

Moissanite

Known for its exceptional brilliance and fire.
The brilliance of moissanite often surpasses that of a traditional diamond.
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Diamond

The hardest naturally occurring substance known.
Diamonds are often used in cutting tools because of their unparalleled hardness.
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Moissanite

A cost-effective alternative to diamonds.
Many couples choose moissanite for their engagement rings as an affordable alternative to diamonds.
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Diamond

A symbol of wealth, luxury, and status.
He gifted her a diamond bracelet as a token of his love and affluence.
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Moissanite

A crystal form of silicon carbide.
Moissanite, a durable silicon carbide creation, is popular in jewelry making.
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Diamond

The traditional choice for engagement rings.
Their engagement was announced with a classic diamond ring.
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Moissanite

A lab-created gem resembling diamonds.
The ring she wore sparkled with a moissanite stone, almost indistinguishable from a diamond.
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Diamond

Widely used in industrial applications for cutting, grinding, and drilling.
Apart from jewelry, diamonds are crucial in industrial processes for their durability.
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Moissanite

A sustainable and ethical choice in gemstones.
They opted for moissanite due to its eco-friendly and ethical production process.
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Diamond

An extremely hard, highly refractive crystalline form of carbon that is usually colorless and is used as a gemstone and in abrasives, cutting tools, and other applications.
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Moissanite

(mineral) Naturally-occurring silicon carbide, having various crystalline polymorphs.
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Diamond

A piece of jewelry containing such a gemstone.
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Diamond

A rhombus, particularly when oriented so that one diagonal extends from left to right and the other diagonal extends from top to bottom.
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Diamond

A red, lozenge-shaped figure on certain playing cards.
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Diamond

A playing card with this figure.
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Diamond

Diamonds (used with a sing. or pl. verb) The suit of cards represented by this figure.
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Diamond

The infield.
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Diamond

The whole playing field.
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Diamond

Of or relating to a 60th or 75th anniversary.
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Diamond

To adorn with diamonds.
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Diamond

(uncountable) A glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron. Category:en:Carbon
The saw is coated with diamond.
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Diamond

A gemstone made from this mineral.
The dozen loose diamonds sparkled in the light.
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Diamond

A ring containing a diamond.
What a beautiful engagement diamond.
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Diamond

A very pale blue color.
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Diamond

Something that resembles a diamond.
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Diamond

(geometry) A rhombus, especially when oriented so that its longer axis is vertical.
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Diamond

(geometry) The polyiamond made up of two triangles.
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Diamond

(baseball) The entire field of play used in the game.
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Diamond

(baseball) The infield of a baseball field.
The teams met on the diamond.
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Diamond

(card games) A card of the diamonds suit.
I have only one diamond in my hand.
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Diamond

A size of type, standardised as 2 point.
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Diamond

The size of type between brilliant and pearl, standardized as 2-point.
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Diamond

Made of, or containing diamond, a diamond or diamonds.
He gave her diamond earrings.
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Diamond

Of, relating to, or being a sixtieth anniversary.
Today is their diamond wedding anniversary.
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Diamond

Of, relating to, or being a seventy-fifth anniversary.
Today is their diamond wedding anniversary.
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Diamond

(slang) First-rate; excellent.
He's a diamond geezer.
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Diamond

To adorn with or as if with diamonds
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Diamond

A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.
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Diamond

A geometrical figure, consisting of four equal straight lines, and having two of the interior angles acute and two obtuse; a rhombus; a lozenge.
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Diamond

One of a suit of playing cards, stamped with the figure of a diamond.
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Diamond

A pointed projection, like a four-sided pyramid, used for ornament in lines or groups.
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Diamond

The infield; the square space, 90 feet on a side, having the bases at its angles.
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Diamond

The smallest kind of type in English printing, except that called brilliant, which is seldom seen.
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Diamond

Resembling a diamond; made of, or abounding in, diamonds; as, a diamond chain; a diamond field.
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Diamond

A transparent piece of diamond that has been cut and polished and is valued as a precious gem
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Diamond

Very hard native crystalline carbon valued as a gem
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Diamond

A playing card in the minor suit of diamonds
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Diamond

The area of a baseball field that is enclosed by 3 bases and home plate
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Diamond

The baseball playing field
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Diamond

A precious stone consisting of a clear and typically colorless crystalline form of pure carbon.
The diamond in her necklace glittered under the evening lights.
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Repeatedly Asked Queries

Is moissanite as hard as diamond?

No, moissanite scores 9.25 on the Mohs scale, slightly less than diamond's 10.
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Why are diamonds so expensive?

Diamonds are expensive due to their rarity, cultural value, and the cost of mining and processing.
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Is moissanite eco-friendly?

Yes, as it is lab-created, it has minimal environmental impact.
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What's the significance of a diamond in jewelry?

Diamonds symbolize luxury, love, and durability.
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Are lab-grown diamonds real diamonds?

Yes, they have the same chemical and physical properties as natural diamonds.
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What is moissanite?

A lab-created gemstone made of silicon carbide.
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Can moissanite pass as a diamond?

To the untrained eye, moissanite can resemble a diamond, but professionals can differentiate them.
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Why choose moissanite over a diamond?

For its affordability, brilliance, and ethical production.
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Are all diamonds flawless?

No, most natural diamonds have some imperfections or inclusions.
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How are diamonds formed?

Diamonds are formed naturally under high pressure and temperature deep within the Earth.
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Are diamonds the hardest material?

Yes, diamonds are the hardest natural material known.
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Do diamonds have resale value?

Yes, diamonds often retain or appreciate in value over time.
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Is moissanite suitable for everyday wear?

Yes, due to its durability, it's suitable for daily wear.
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How are diamonds graded?

cut, color, clarity, and carat weight.
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Is moissanite a recent invention?

It was discovered in 1893 and later produced as a gemstone in labs.
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What makes diamonds so brilliant?

Their unique atomic structure and how they refract light.
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Can diamonds come in different colors?

Yes, diamonds can be colorless or come in various hues like yellow, blue, and pink.
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Does moissanite look different from a diamond?

Moissanite has more fire and a slightly different brilliance compared to diamonds.
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How to care for moissanite jewelry?

Clean with mild soap and water; it’s durable but can scratch.
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What are the uses of moissanite outside jewelry?

It’s used in high-pressure experiments due to its hardness and thermal conductivity.
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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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