Moissanite Princess Cut: The Complete Guide

September 1, 2026

The princess cut is the second most popular engagement ring shape in the world, surpassed only by the round brilliant. It is a square-outline stone with a modified brilliant facet pattern — developed in the 1960s and refined through the 1980s — that produces exceptional light return and sparkle in a clean, geometric profile that reads as modern and architectural without being severe.

In moissanite, the princess cut delivers all of this at a fraction of what a diamond princess cut costs — and with the added advantage of moissanite's superior dispersion (0.104 vs. diamond's 0.044), which means the fire in a moissanite princess cut is more vivid than in a diamond of equivalent size and quality. This is the complete guide to moissanite princess cut rings: what makes the cut distinctive, how to choose proportions, which settings work best, and how it compares to the round brilliant.

What Is a Princess Cut?

The princess cut is a square (or very slightly rectangular) modified brilliant cut. Its defining characteristics:

Profile: Square outline when viewed from above, with four sharp corners rather than the rounded outline of a cushion or the soft points of a pear. The clean right angles give the princess cut its architectural, modern character.

Facet structure: The princess cut typically has 58 facets (the same number as a standard round brilliant), arranged in a chevron pattern on the pavilion (the bottom of the stone). This chevron pattern is what distinguishes a princess cut from other square cuts like the radiant or Asscher — it produces a distinctive "X" or cross pattern visible when looking directly into the stone, and creates a specific brilliance pattern of larger, more directional flashes rather than the smaller, more distributed sparkle of a round brilliant.

Visual effect: The princess cut is brilliant but with more directionality than a round. It catches light and returns it in bolder, more geometric flashes. From a distance, a well-cut princess moissanite looks extremely bright; up close, the facet pattern is visible and adds to the stone's visual character.

Princess Cut vs. Round Brilliant: The Real Differences

The most common decision buyers face is between princess and round. The honest differences:

Visual size: A princess cut stone appears slightly larger face-up than a round brilliant of the same carat weight. This is because the square outline covers more surface area than a circle of equivalent diameter. A 1-carat princess cut moissanite has a face-up area of approximately 28mm²; a 1-carat round has approximately 26mm². The difference is modest but visible.

Brilliance pattern: Round brilliants have a more uniform, distributed sparkle — many small, evenly distributed flashes in all directions simultaneously. Princess cuts have a more directional, bold brilliance — larger flashes that are more concentrated. Neither is better; they are different aesthetic experiences. The round reads as more classically brilliant; the princess reads as more architectural and bold.

Profile height: Princess cuts typically have a higher crown (the top portion of the stone) relative to their width compared to round brilliants. This gives the princess cut a more three-dimensional, present visual quality — it sits more visibly above the setting. Buyers who want a stone with visual height and presence often prefer the princess.

Style language: The round brilliant is the most universally wearable shape — it reads equally well in vintage, modern, and classic settings. The princess cut reads as specifically modern and architectural. It pairs naturally with geometric settings, channel-set bands, and clean-lined solitaires. It is less naturally at home in elaborate vintage or organic settings, though it can work with the right design.

Proportions: What Makes a Well-Cut Princess

Princess cut quality is determined primarily by three proportions:

Length-to-width ratio: A true square princess cut has an L:W ratio of 1.00–1.03. Ratios above 1.05 produce a noticeably rectangular stone that is sometimes called a "rectangular princess" or more accurately described as a rectangular modified brilliant. Most buyers seeking a princess cut want a ratio of 1.00–1.02 for a visually square stone.

Table percentage: The table (the large flat facet on top) expressed as a percentage of the stone's total width. For princess cuts, an ideal table percentage is 65–75%. A table that is too large (over 80%) makes the stone look flat and reduces the crown's contribution to light return. A table that is too small produces an overly deep stone that retains carat weight in depth rather than face-up size.

Depth percentage: Total depth as a percentage of width. Ideal range for princess cuts: 65–75%. Stones outside this range either leak light (too shallow) or appear smaller face-up than their carat weight suggests (too deep).

The GRA certificate accompanying every Moissanite Shine stone includes these proportions. Read more: GRA Certificate Explained.

The Corner Vulnerability: The Most Important Practical Consideration

The princess cut's four sharp corners are its most distinctive visual feature and its primary durability consideration. The corners are the thinnest points of the stone and the points most vulnerable to chipping if struck sharply against a hard surface.

Moissanite at 9.25 Mohs is significantly harder than diamond (10.0 Mohs is harder, but moissanite's toughness is excellent) — but even hard materials can chip at sharp corners under sufficient lateral force. The practical implication: the setting for a princess cut must protect the corners. Read more: Moissanite Mohs Hardness.

Settings: Which Work Best for Princess Cut Moissanite

Four-prong V-tip setting: The optimal setting for a princess cut. Four prongs, each positioned at a corner of the stone with a V-shaped prong tip that cradles and protects the corner. This setting maximizes light entry to the stone (prongs are minimal and positioned at corners rather than over facets) while providing corner protection. It is the classic princess cut setting for good reason.

Bezel setting: A full bezel surrounding the princess cut protects all four corners completely. The bezel reduces light entry slightly compared to a prong setting but provides maximum protection. For active wearers or those concerned about corner vulnerability, a bezel is the practical choice. A bezel on a princess cut creates a very clean, architectural look that emphasizes the square geometry of the stone.

Channel-set band: Princess cuts pair naturally with channel-set side stones or a channel-set wedding band because the square outline of the princess cut aligns cleanly with channel-set square or baguette stones. The geometric consistency creates a cohesive, architecturally satisfying composition.

Avoid: Prong settings that position prongs over the stone's flat sides rather than at corners, which reduces corner protection and partially obscures the stone's outline. Cathedral settings that elevate the princess cut very high increase corner exposure to incidental contact.

Size Guide: Princess Cut Face-Up Dimensions

Princess cut dimensions by approximate carat weight (these are approximate; actual dimensions vary with depth):

0.50 carat: approximately 4.4 × 4.4mm
0.75 carat: approximately 5.1 × 5.1mm
1.00 carat: approximately 5.5 × 5.5mm
1.50 carat: approximately 6.5 × 6.5mm
2.00 carat: approximately 7.0 × 7.0mm
3.00 carat: approximately 8.0 × 8.0mm

The princess cut's square outline means that face-up dimensions are described by a single measurement (width) rather than the length × width description used for oval, pear, or cushion cuts. Read more: Complete Moissanite Size Guide.

Metal Pairing: What Works Best

The princess cut's geometric, modern character pairs most naturally with:

White gold or platinum: The clean silver tone of white metals complements the princess cut's architectural aesthetic. A princess moissanite in a four-prong V-tip solitaire in platinum or 14K white gold is the most classically modern combination and the most popular.

Yellow gold: A princess cut in yellow gold creates a warmer, slightly vintage-modern combination that works particularly well with near-colorless (GH) moissanite. The warmth of yellow gold softens the princess cut's hard geometry in a way that reads as intentional and sophisticated rather than at odds.

Rose gold: Princess cut in rose gold is a less common but striking combination — the romantic warmth of rose gold against the crisp geometry of the princess cut creates an interesting tension that many buyers find very appealing and distinctive. Read more: Moissanite in Yellow Gold vs. White Gold.

Explore our moissanite engagement ring collection including princess cut options — DEF color, VVS1 clarity, GRA-certified, backed by our Lifetime Gemstone Warranty. For a custom princess cut design, visit our custom design service.

🛡️ Lifetime Gemstone Warranty — Your stones are protected forever.

⬆️ Lifetime Upgrade Program — Upgrade your stones or metal anytime.

✏️ Request a Custom Design — Make it uniquely yours.

📐 Not sure of your size? View our Ring Size Guide & Jewelry Care Tips