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Triangular Brilliant • 31 – 50 Facets

Trillion Cut Lab Diamonds.
Striking Geometric Fire Direct to USA.

Displaying a bold triangular geometry with straight or subtly curved sides, the trillion cut lab grown diamond (Trilliant) delivers fiery brilliance and expansive surface spread. Faceted in Surat both as striking modern center solitaires and calibrated matched side pairs for three-stone engagement rings.

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IGI Graded Solitaires & Matched Side Pairs Free Insured USA Delivery
Trillion Cut Lab Grown Diamond Ring
Trilliant Brilliant
High Surface Spread
Facet Configuration
31 – 50 Facets
Sides / Edges
Curved or Straight
Table %
55.0% – 65.0%
Total Depth %
40.0% – 48.0%
✦ Direct Factory Value ✦

Trillion Cut Lab Diamond Price Guide

Compare Surat factory direct wholesale prices for certified IGI Trillion Cut CVD diamonds against standard US retail jewelry stores.

1.50 CARAT

1.50ct Trillion Cut

Expansive face-up presence (~8.0 × 8.0mm) delivering modern geometric sparkle in solitaire mountings.

Surat Factory Price: $520 – $750 USD
US Retail Store: $2,200 – $3,000
Mined Trillion Cut: $8,000+
AVANT-GARDE
2.50 CARAT

2.50ct Trillion Cut

Monumental triangular surface spread (~9.8 × 9.8mm) commanding attention with fierce brilliance.

Surat Factory Price: $890 – $1,250 USD
US Retail Store: $4,200 – $5,800
Mined Trillion Cut: $20,000+
MATCHED PAIRS

Matched Trillion Pairs

Calibrated straight-edged side pairs (0.50ct to 2.00ct total weight) to flank center diamonds.

Factory Pair Price: $380 – $750 USD
US Retail Store: $1,800 – $2,800
Usage: Three-Stone Accents
Need Straight-Sided Side Stones or a Curved Center Solitaire?

We custom calibrate trillion diamonds for both applications in Surat. Request 360° loupe videos, millimeter calibration measurements, and digital IGI certs.

✦ Triangular Geometry ✦

Curved Center Stones vs. Straight Side Stones

Developed in Amsterdam and perfected in the 1960s, the trillion cut features an equilateral triangular silhouette faceted with brilliant-style triangular and kite facets.

When choosing a trillion diamond, the edge profile dictates its best application:
1. Curved Edges (Trilliant): The three sides curve gently outward in convex arcs. This curvature increases internal light reflection, delivering maximum fire and dispersion, making it ideal as a standalone center stone for modern engagement rings and pendants.
2. Straight Edges: The three sides are laser-cut straight and flat. This allows the trillion to sit completely flush against the flat shoulder of a center princess, radiant, or emerald cut diamond in a three-stone mounting.

High Surface Spread

Shallow pavilion creates a face-up size much larger than a round diamond.

Triple V-Prong Setting

Protective chevron prongs wrap all 3 acute triangular points.

Trillion Cut Buying Guide

1:1:1 Equilateral Ratio

All three sides must be of identical millimeter length for true optical symmetry.

Clarity: Eye-Clean VS2+

Brilliant faceting masks inclusions well, allowing high value with VS2/SI1 clarity.

Depth: 40% – 48% Optimum

Avoid overly shallow stones under 35% depth which can produce a glassy center window.

Speak with a Trillion Specialist
✦ Handcrafted Fine Bridal ✦

Popular Trillion Engagement Ring Settings

The trillion cut lab diamond creates bold, avant-garde jewelry. Our Surat master jewelers handcraft custom mountings in Solid Platinum 950, 14K/18K Yellow Gold, White Gold, and Rose Gold.

3 V-Prong Solitaire
Protective chevron V-prongs shielding each of the three sharp corners on a knife-edge band.
Three-Stone Princess & Trillions
Center square princess or radiant diamond flanked by matched straight-edged trillion side stones.
Triangular Bezel Setting
Low-profile modern gold bezel outlining the triangular silhouette with zero snagging prongs.
Round Diamond with Trillions
Center round brilliant diamond flanked by curved trillion side diamonds pointing outward.
Custom Trillion Cut Lab Diamond Ring
✦ Buyer Education ✦

Frequently Asked Questions

Expert answers regarding certified trillion cut lab grown diamonds.

A trillion cut diamond (also called a trilliant) is a triangular shaped diamond with three equal sides. It features 31 to 50 brilliant facets that reflect intense fiery scintillation. It can be faceted with either straight edges (common for side accent stones) or gently curved convex edges (popular for center solitaires).

**Straight-edged trillions** have crisp, straight boundaries engineered to sit flush against the flat side of a center diamond in three-stone rings. **Curved-edged trillions** have slightly convex rounded sides that soften the triangle and maximize light return, making them the preferred choice for standalone center stones.

Yes, noticeably! Because trillion diamonds are cut shallowly (around 40% to 48% total depth compared to 60%+ for a round diamond), more of the diamond's carat weight is concentrated in its wide face-up crown. A 1.00ct trillion diamond measures approximately 7.0mm across compared to 6.5mm for a 1.00ct round diamond.

All three triangular corners terminate in sharp, acute points that can chip if left exposed. Always ensure your mounting is built with **three V-prongs (chevron prongs)** or a full bezel setting. The V-prongs encapsulate each point, shielding the crystal from daily wear and accidental impacts.

Direct from our Surat diamond factory, a certified 2 carat trillion cut lab grown diamond (D-F Color, VVS/VS Clarity) costs between $720 and $1,050 USD. In US retail jewelry stores, the same diamond costs $3,000 to $4,200 USD, and a mined counterpart costs $17,000+.
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