• Color-change lab-grown alexandrite in tweezers, showing its pointed Dutch marquise outline and mixed facet pattern.
  • Video of BLS112 in tweezers, showing its facets and color response as the viewing angle changes.
  • Face-up BLS112 lab-grown alexandrite with red-purple color and greenish-blue reflections.
  • Angled face-up BLS112 alexandrite showing its elongated hexagon outline and facet reflections.
  • Alternate face-up view of the BLS112 lab-grown alexandrite, showing changes in red-purple and greenish-blue reflections.
  • BLS112 color-change lab-grown alexandrite shown on a fingertip for an approximate sense of its 12 × 6 mm face-up size.
  • Second fingertip view of the BLS112 lab-grown alexandrite, showing a different reflection pattern and color balance.
  • Side profile of BLS112 in tweezers, showing its pointed ends and approximate 4.6 mm depth.
  • Video of BLS112 under a second lighting condition, showing changes in color and reflections.
  • Representative GFCO Gem Lab report for BLS112. The supplied stone includes its own corresponding report.
  • Brahma Diam card explaining the Czochralski pulling method used to grow this lab-grown alexandrite.
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12 × 6 mm Color-Change Lab-Grown Alexandrite, Dutch Marquise

12 × 6 mm Color-Change Lab-Grown Alexandrite, Dutch Marquise

$330.00 USD
$330.00 USD
Sale Sold out
Taxes included. Standard shipping · Estimated delivery in about 2 weeks.

Individually faceted in our Bangkok gemstone-cutting facility, this approximately 12 × 6 mm Czochralski-pulled lab-grown alexandrite with a color-change response is cut in our Dutch marquise design with an elongated-hexagon outline. Representative BLS112 stones show greenish-blue and red-purple or purple-red appearances; the balance and strength of the color change vary by stone and light source.

This is a repeat-production product. The supplied stone will be made from the same specified Czochralski-grown lab-grown alexandrite material and follow the same shape and cutting style, but it may differ slightly from the representative photographs and video. Each order includes one loose lab-grown alexandrite with its own corresponding GFCO Gem Lab report.

Stone details

  • Material: Lab-grown alexandrite (synthetic chrysoberyl)
  • Growth method: Czochralski pulled
  • Post-growth treatment: None
  • Color range: Greenish-blue to red-purple / purple-red; varies by stone and light source
  • Trade shape: Dutch marquise
  • Outline: Elongated hexagon
  • Laboratory shape designation: Hexagon
  • Cutting style: Brilliant & Step Modified
  • Standard face-up size: Approximately 12 × 6 mm
  • Nominal depth: 4.6 mm
  • Production tolerance: ±0.2 mm in length, width and depth
  • Approximate weight: Around 2.2 carats; varies by stone
  • Laboratory report: Individual GFCO Gem Lab report included
  • Faceting location: Our gemstone-cutting facility in Bangkok, Thailand
  • Quantity supplied: One loose lab-grown alexandrite
  • SKU: BLS112

Color change and viewing

The apparent color depends on the spectral characteristics of the light source. Viewing angle, surroundings and display settings can also affect the color balance and reflections you perceive. The gallery demonstrates representative BLS112 color behavior and does not guarantee an identical appearance in every environment.

Individual report and current stone

The report shown in the gallery is representative. The stone supplied with your order will include its own GFCO Gem Lab report stating its reported measurements, carat weight, identification details and individual report number. Contact us before ordering if you need the currently available stone’s measurements, weight, photographs or video, or require delivery by a particular date.

Fit and custom cutting

Your jeweler should confirm the final fit against the supplied stone and protect both pointed ends during setting. If you need this material in another size or shape, contact Brahma Diam to discuss custom cutting, subject to material availability and cutting feasibility.

Learn how the Czochralski pulling method works.

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BLS112

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