20.925ct Ametrine Purple (Amethyst) –Yellow (Citrine) | Pixel Cut | 15x20 mm | Gemdrop® Verified

A spectacular 20.925 ct lab-grown Ametrine quartz displaying a striking natural-style combination of Amethyst purple and Citrine yellow within a single crystal.

Ametrine is a bicolour variety of quartz (SiO₂) combining the purple tones associated with amethyst and the yellow tones associated with citrine. This laboratory-grown gem has the same fundamental mineral composition and optical character as quartz, while being created under controlled conditions rather than formed naturally within the Earth.

Every Gemdrop® gem is individually scientifically verified and permanently recorded within the Gemdrop Verification Database, providing transparency and confidence in exactly what you are purchasing.

REAL QUARTZ. CREATED THROUGH SCIENCE.

This gem is laboratory-grown quartz, chemically composed of silicon dioxide (SiO₂).

Quartz belongs to the trigonal crystal system and typically has a refractive index around 1.55, consistent with the optical properties of amethyst, citrine, and ametrine.

Its distinctive appearance combines:

• Purple zones: Amethyst colour

• Yellow zones: Citrine colour

The interaction between these contrasting colours gives ametrine its distinctive bicolour appearance and makes each faceted gem visually dynamic.

PRECISION PIXEL CUT

The striking Pixel Cut is a precision fantasy cut designed to create bold geometric reflections and a distinctive pixel-like pattern across the face of the gem.

Its complex faceting interacts with the contrasting purple and yellow colour zones, creating shifting areas of brightness, depth, and colour as the gem moves through the light.

At approximately 15 × 20 mm and 20.925 ct, this is a substantial statement gem ideal for bespoke jewellery, pendants, collector pieces, and dramatic custom designs.

With a Mohs hardness of 7, quartz is durable enough for many jewellery applications, although it should be treated with more care than harder materials such as sapphire or ruby.

GEMDROP® VERIFIED

Every Gemdrop® gem undergoes scientific verification before being permanently recorded within the Gemdrop Verification Database.

Verification records document key gemmological information including identity, dimensions, crystal system, optical properties, and physical characteristics.

Specifications

• Gem Type: Ametrine

• Mineral: Quartz

• Chemical Formula: SiO₂

• Crystal System: Trigonal

• Origin: Lab-Grown

• Colour: Purple (Amethyst) – Yellow (Citrine)

• Refractive Index: ~1.55

• Cut Style: Precision Fantasy Cut

• Cut: Pixel Cut

• Dimensions: 15 × 20 mm

• Weight: 20.925 ct

• Hardness: 7 Mohs

• Verification: Gemdrop® Verified

Scientifically verified. Transparently documented. A remarkable bicolour quartz gem created through science.