The 4Cs of Stdiam Moissanite

Moissanite is a near-colorless gemstone that’s composed of silicon carbide. First discovered in 1893 by a French scientist named Henri Moissan, who later won the Nobel Prize in Chemistry, moissanite was originally found in the crater left behind by a fallen meteor. Although they look similar at first glance, moissanite is very different from a diamond. Diamonds are made of carbon, whereas moissanites are made of pure silicon carbide — an extremely rare, naturally-occurring mineral. The natural moissanite discovered by Moissan in 1893 is exceptionally rare, making it practically impossible to use natural moissanite for jewelry. Natural moissanite is incredibly rare, so moissanite available today is laboratory-created.

Every moissanite gemstone from STDIAM's is assigned a unique Inscription Number engraved on the girdle.

The globally recognized 4C grading system is the most reliable way to understand the quality, beauty, and value of a gemstone. When evaluating our moissanite, we look closely at these four essential pillars:

  • Cut: The masterful artistry and exact precision used to shape and facet the stone.
  • Color: The measurement of how truly colorless—or brilliantly hued—the gemstone is.
  • Clarity: The assessment of purity, confirming the absence of microscopic internal characteristics.
  • Carat: The physical size and diamond-equivalent weight of the stone.

Because modern Stdiam moissanite is meticulously crafted in controlled laboratory environments, we are able to achieve extraordinary quality across every single "C." Far exceeding the label of a simple "diamond alternative," moissanite is a uniquely brilliant gemstone graded with the same rigorous standards as mined diamonds. To ensure absolute perfection, every Stdiam moissanite is individually inspected by expert gemologists to guarantee flawless clarity and breathtaking color.

Stdiam Moissanite Cut

The cut is the true secret behind a gemstone's sparkle. It is the precise process of shaping and faceting the raw material to unleash its maximum brilliance, fire, and light return. Simply put, the cut dictates how beautifully your jewelry will shine across a room. At Stdiam, our master lapidaries utilize advanced techniques to transform rough moissanite into perfectly proportioned, brilliantly faceted masterpieces designed to capture every ray of light.

Stdiam Moissanite Color

Stdiam offers a spectacular spectrum of moissanite colors, ranging from pristine, colorless stones to vibrant, exotic fancy hues to suit any unique preference.

The unique shade of a Stdiam moissanite is a result of precise internal chemistry and the masterful control of trace elements during its laboratory creation process. This ensures absolute consistency and purity in every stone we produce.

Following the standard D-to-Z grading scale, D-grade represents absolute, icy colorlessness—the pinnacle of rarity. As you move toward Z-grade, the stone takes on increasingly distinct warm yellow or brown tint. At Stdiam, we specialize almost exclusively in the Colorless (D-F) range to guarantee maximum brilliance.

 
Colorless (D-E-F) Near-Colorless (G-H-I-J) Faint Color (K-Z)

Stdiam Moissanite Clarity

Understanding clarity is essential when selecting your forever piece. Just like naturally mined diamonds, moissanite is carefully graded on a strict clarity scale to evaluate its visual purity.

Because every Stdiam moissanite is meticulously cultivated in an advanced, controlled laboratory environment, our gemstones are virtually free of the microscopic internal inclusions or external blemishes often found in natural stones.

As a result, our collection boasts exceptional, eye-clean clarity. The vast majority of our stones achieve a premium VVS1 to VS1 grading, ensuring your jewelry delivers a flawless, crystal-clear sparkle that lasts a lifetime.

Stdiam Moissanite Carat

The concept of "carat" is one of the most common misunderstandings in fine jewelry. While often mistaken for a gemstone's physical dimensions, carat actually refers specifically to its weight (with one carat equaling 0.2 grams).

At Stdiam, we believe in complete transparency. Because moissanite is inherently less dense than a traditional diamond, it weighs approximately 10% less. This means a moissanite and a diamond of the exact same physical size will have different carat weights.

To ensure you get the precise look and presence you desire, we highly recommend focusing on the stone's physical millimeter (mm) measurements alongside its masterfully crafted shape, rather than just the carat weight alone. Our Diamond Equivalent Weight (DEW) sizing makes this comparison effortless.

The Stdiam Excellence Promise

At Stdiam, our commitment to brilliance means we exclusively craft moissanite with the highest tier of cut and polish. We believe that exceptional value should never come at the expense of breathtaking beauty. That is why every gemstone in our collection strictly meets the 'Excellent' cut grade—ensuring your jewelry delivers maximum fire and uncompromising sparkle.

Purchase High-Quality Moissanite

Cushion Moissanite Pave Ring
De $179.00
De $179.00
Royal Princess Cut Halo Moissanite Ring
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Opera Three Stone Oval Moissanite Ring
De $208.00
$0.00
De $208.00
Marquise Cut Moissanite Twisted Vine Engagement Ring
De $188.00
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De $188.00
Signature Oval Engagement Halo Moissanite Ring
De $138.00
$0.00
De $138.00
Enchanted Forest Pear Vine Engagement Ring
$238.00
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$238.00