• Face-up view of a blue lab-grown sapphire with a long hexagon outline and clearly defined step-cut reflections.
  • Blue lab-grown sapphire held upright in tweezers, showing the complete long-hexagon outline and step-cut face.
  • Blue long-hexagon lab-grown sapphire resting on fingertips, showing the face and its scale against the skin.
  • GFCO report photograph marked SAMPLE for the blue lab-grown sapphire production, shown against dark fabric.
  • Blue long-hexagon lab-grown sapphire at an angle, showing its outline, broad table and surrounding step facets.
  • The blue step-cut lab-grown sapphire tilted diagonally on white, with its pointed ends fully visible.
  • Closer angled view of the blue long-hexagon lab-grown sapphire, showing alternating pale and dark step reflections.
  • Blue step-cut sapphire in tweezers at a slight angle, showing pale central reflections and blue pointed ends.
  • Upright blue long-hexagon sapphire in tweezers, with bright long reflections running through the center.
  • The blue lab-grown sapphire tilted in tweezers, with strong white reflections across the step-cut face.
  • The blue long-hexagon sapphire face-up in tweezers, with a fingertip behind it for scale.
  • The blue step-cut sapphire resting diagonally on fingertips, with its complete outline visible.
  • Blue long-hexagon sapphire on fingertips, photographed at a shallow angle to show changing facet reflections.
  • Blue elongated-hexagon lab-grown sapphire on white, with bright broad reflections across the step facets.
  • The long hexagon blue lab-grown sapphire face-up, with dark parallel reflections through its center.
  • The blue long-hexagon sapphire from a low oblique angle, showing its height and step-faceted side.
  • Low side profile of the blue long-hexagon sapphire, showing the crown and pavilion above and below the edge.
  • Reverse view of the blue elongated-hexagon sapphire, with broad pale reflections through the underside.
  • Reverse of the blue elongated-hexagon sapphire held upright in tweezers against a pale background.
  • The underside of the blue long-hexagon sapphire in tweezers, with a fingertip behind it for scale.
  • Original product movement video taken in natural light.
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Cornflower Blue Lab-Grown Sapphire, 12x6mm Dutch Marquise

Cornflower Blue Lab-Grown Sapphire, 12x6mm Dutch Marquise

$363.00 USD
$363.00 USD
Sale Sold out
Taxes included. Standard shipping · Estimated delivery in about 2 weeks after dispatch.

BLS135

Low stock: 3 left

Import duties covered.

Standard: about 2 weeks after dispatch. Express: estimated 3–7 days after dispatch. Processing time is separate.

Returns: notify us within 14 days of receipt. Policy conditions and custom-order exclusions apply.

Shipping and returns details Refund policy

Long bands of light move across the stepped facets of this cornflower-blue lab-grown sapphire. The Dutch marquise outline—an elongated hexagon with pointed ends—gives the approximately 12 x 6 mm stone a clean, architectural presence.

One loose sapphire is supplied with its own GFCO report; a setting is not included. This is repeatable production, so the photographs show a representative sample rather than the exact individual stone for every order.

GEMSTONE DETAILS

  • SKU: BLS135
  • Product: Lab-grown sapphire; synthetic corundum
  • Commercial face-up size: Approximately 12 x 6 mm
  • Reference dimensions: Approximately 12 x 6 x 4.5 mm; depth and exact measurements vary
  • Reference weight: Approximately 2.5 ct per stone; exact weight varies
  • Trade shape: Dutch marquise / long hexagon
  • GFCO sample shape: Hexagon; cutting style: Step & Step
  • Colour: Cornflower blue; sample report colour: Blue
  • Clarity: Loupe clean
  • Growth method: Czochralski
  • Faceted in our own Bangkok gemstone-cutting unit, Thailand
  • Quantity: One loose sapphire; setting not included

CHARACTER AND SETTING IDEAS

The appeal is in the changing long reflections: pale blue and bright bands alternate with deeper blue as the stone tilts. Its straight-sided shape can suit a ring centre or a pendant, with the orientation chosen to complement your design.

CLARITY AND SETTING GUIDANCE

Loupe clean. Ask your jeweler to check the individual dimensions and setting fit, including protection for the pointed ends, before mounting.

PHOTOS AND VIDEO

The photographs and video were taken in natural light and show a representative sample. Exact weight, measurements, depth, colour tone and report number can vary slightly between pieces. Appearance also varies with illumination, viewing angle, surroundings and display settings.

GFCO LABORATORY REPORT

Each supplied stone includes its own GFCO report. The pictured report is marked SAMPLE; the report supplied with your stone corresponds to that stone, not necessarily to the sample's identifiers or exact measurements.

The sample identifies lab-grown sapphire, synthetic corundum, Blue, Hexagon and Step & Step, with Czochralski production and approximate 2.5 ct / 12 x 6 x 4.5 mm reference values. Loupe clean is our clarity description; post-growth treatment has not been specified.

If you require a different independent report, contact us before purchase to agree the laboratory, scope, cost and turnaround. Additional reporting extends dispatch.

CUSTOM SIZES AND MATCHING

For a matched pair, larger quantity, another size or modified proportions, message us before ordering. We can discuss the cutting specifications and confirm availability and production timing for your project.

ABOUT US

Brahma Diam Co., Ltd. is based in Bangkok, Thailand, with a gemstone-cutting facility in Bangkok and a diamond-cutting unit in Surat, India. We cut gemstones and diamonds, with attention to the individual colour, proportions and character of each design.

SHIPPING

Ships from Bangkok, Thailand. Check the current processing estimate, shipping options and delivery estimates shown for your destination. If you have a required-by date, contact us before ordering. Processing time is separate from transit.

For a design that makes a feature of long blue reflections and crisp geometry.

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