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The JBC Diamond Dictionary: A Masterclass in Antique Soul - Jewelry by Cleo

The JbC Diamond Dictionary: A Masterclass in Antique Soul

Modern diamonds are cut by lasers to be perfect. JBC diamonds are cut to have a pulse. Before the era of high-tech precision, diamond cutters used their eyes and the flicker of candlelight to find a stone’s "fire."

Here is how to identify and choose the cut that speaks to your architectural style.

1. The Old Mine Cut (OMC)

The "Architectural Cushion"

  • The Era: 1700s – Late 1800s (Georgian & Victorian)

  • The Silhouette: A soft, squarish "cushion" with rounded corners.

  • The Look: Known for its high crown and small table (the top flat surface). OMCs feature "chunky" facets that create broad flashes of light rather than tiny sparkles.

  • The Signature: Look for the open culet—a small, flat facet at the very bottom of the stone that appears as a soft circle in the center.

  • Best For: The Cleo Duo or OMC Studs. It’s the ultimate choice for someone who wants a bold, structural presence.

2. The Old European Cut (OEC)

The "Floral Round"

  • The Era: Late 1800s – 1930s (Edwardian & Art Deco)

  • The Silhouette: Round, but with a hand-carved feel that isn’t "perfectly" circular.

  • The Look: The precursor to the modern round brilliant. It shares the high crown of the OMC but applies it to a circular shape. It emits a warm, romantic glow.

  • The Signature: A "inner petal" facet pattern that looks like a blooming rose when viewed from the top.

  • Best For: The Cleo Mosaic Band. It provides a softer, feminine contrast to the sharp lines of a bezel.

3. The Rose Cut

The "Petal of Light"

  • The Era: Dating back to the 1500s (Pre-Georgian)

  • The Silhouette: Flat on the bottom, domed on the top.

  • The Look: Because it has no "basement" (pavilion), the rose cut sits low and flat against the skin. It doesn't "sparkle" in the traditional sense; it shimmers like water.

  • The Signature: Triangular facets that meet at a point in the center, mimicking the spiral of a rosebud.

  • Best For: Minimalist pendants or low-profile "second skin" rings. It’s the "quietest" of the luxury cuts.

4. The Step Cuts (Antique Asscher & Emerald)

The "Hall of Mirrors"

  • The Era: 1920s – 1930s (Art Deco)

  • The Silhouette: Rectangular or square with cropped corners.

  • The Look: Unlike the "brilliant" cuts above, step cuts feature parallel facets. They don't hide inclusions; they celebrate clarity and depth.

  • The Signature: A "staircase" effect that draws the eye deep into the center of the diamond.

  • Best For: Bold, geometric statement rings. It is the most "architectural" of all the cuts.

Comparison at a Glance

Feature Old Mine Cut (OMC) Old European Cut (OEC) Modern Brilliant
Shape Squarish / Cushion Round-ish Perfectly Round
Light Play Broad "Fire" (Colors) Romantic Glow White "Brilliance" (Sparkle)
Culet Large & Visible Small to Medium Pointed / Invisible
Vibe Bold & Structural Soft & Floral Sharp & Precise


Why These Cuts Are Trending in 2026

The "Taylor Swift Effect" and a global move toward "Slow Luxury" have made antique cuts the most sought-after silhouettes this year. In a world of mass production, an OMC or OEC diamond feels like a thumbprint—no two are exactly alike. Whether you choose a natural heirloom or a lab-grown masterpiece, you are choosing a cut that was designed to be beautiful by the human eye, not a computer algorithm.

READY TO MAKE SOMETHING YOURS?

Every Cleo piece starts with a conversation — about what you're envisioning, what the piece means, and what will make it exactly right. There's no pressure and no commitment. Just a conversation with Gabrielle.

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