~11ct Tanzanite Blue Cubic Zirconia | Cushion Cut | 12 × 12 mm | Gemdrop® Verified

~11 carats. Tanzanite Blue. Cushion Cut. Exceptional colour, brilliance, and presence.

Experience the rich blue-violet beauty of this ~11 ct Tanzanite Blue Cubic Zirconia, precision cut into a substantial 12 × 12 mm Cushion Cut.

Its vivid Tanzanite Blue colour blends saturated blue with violet undertones, creating a dramatic appearance inspired by the distinctive colour palette associated with fine tanzanite.

The softly rounded corners and brilliant faceting of the cushion cut create broad flashes of light, strong sparkle, and excellent visual depth.

At approximately 11 carats, this is a serious statement gem — ideal for bold rings, pendants, jewellery design, display, or bespoke commissions.

TANZANITE BLUE. DEEP COLOUR. STRONG PRESENCE.

This gem is coloured to produce a rich blue-violet appearance reminiscent of tanzanite, while retaining the brightness and optical performance of cubic zirconia.

Depending on the lighting, expect tones ranging from:

• Deep blue
• Violet-blue
• Royal blue
• Indigo
• Bright electric flashes under direct light

The result is an intensely coloured gem with excellent contrast between its deep body colour and brilliant reflections.

Important: this gemstone is Tanzanite Blue cubic zirconia. It is not natural or laboratory-grown tanzanite.

THE CUSHION CUT

Soft corners. Bold proportions. Brilliant performance.

The Cushion Cut combines a square outline with gently rounded corners and brilliant-style faceting.

This creates a balance between classic and contemporary design, with excellent light return and a softer silhouette than sharper square cuts.

At 12 × 12 mm, this gem has commanding visual presence and is particularly suited to:

• Statement rings
• Cocktail rings
• Pendants
• Jewellery design
• Collector pieces
• Bespoke commissions

~11 CARATS OF CUBIC ZIRCONIA

At approximately 11 ct, this is a substantial loose gemstone with significant visual impact.

Cubic zirconia is a laboratory-created crystalline material valued for its:

• High brilliance
• Excellent clarity
• Strong dispersion
• Consistent colour
• Precision cutting
• Accessibility at larger sizes

This makes it especially useful for statement jewellery, experimental designs, prototypes, and finished pieces where scale and colour are important.

EXCEPTIONAL BRILLIANCE

Cubic zirconia has a refractive index of approximately 2.15–2.18, giving it excellent brilliance and light return.

Its dispersion of approximately 0.058–0.066 produces visible spectral fire, particularly under direct illumination.

With a Mohs hardness of approximately 8–8.5, cubic zirconia is sufficiently durable for many jewellery applications when appropriately set and cared for.

GEMDROP® VERIFIED

Every Gemdrop® gem is individually assessed and recorded so you know exactly what you are buying.

This gem includes:

• Individual Gemdrop® assessment
• Unique Gemdrop® ID
• Permanent online gem record
• QR-code identification
• Gemdrop® Lifetime Authenticity Guarantee

Our approach combines gemmology, scientific identification, and transparent product information to give collectors and jewellery makers confidence in every gem.

GEM SPECIFICATIONS

• Gem: Cubic Zirconia
• Material: Cubic Zirconia
• Chemical Composition: Zirconium Dioxide (ZrO₂)
• Colour: Tanzanite Blue
• Shape: Square Cushion
• Cut: Cushion Cut
• Dimensions: 12 × 12 mm
• Weight: ~11 ct
• Refractive Index: ~2.15–2.18
• Dispersion: ~0.058–0.066
• Mohs Hardness: ~8–8.5
• Origin: Laboratory-Created
• Assessment: Individually Assessed by Gemdrop®
• Identification: Unique Gemdrop® ID
• Guarantee: Gemdrop® Lifetime Authenticity Guarantee

BIG COLOUR. BIG PRESENCE.

The combination of ~11 ct size, saturated Tanzanite Blue colour, and a broad 12 × 12 mm Cushion Cut creates an immediately eye-catching gemstone.

It is large, vibrant, brilliant, and designed to stand out.

For jewellery makers, collectors, or anyone searching for a large blue gemstone, blue cubic zirconia, Tanzanite Blue CZ, or a 12 mm cushion cut gem, this piece offers exceptional visual impact.

~11 Carats. Tanzanite Blue. Cushion Cut. 12 × 12 mm.

REAL CUBIC ZIRCONIA. CREATED THROUGH SCIENCE.