The Facet House · Bangkok
Cornflower Blue
|
| 1.92 ctWeight | Square CushionShape |
Sri LankaOrigin |
Read the dimensions before anything else: 7.09 × 7.05 mm. That is four hundredths of a millimetre off a true square. Cutting a square cushion means fighting the rough for symmetry and losing weight doing it, which is why most stones sold as square come out visibly longer one way. This one did not.
The symmetry is not just a specification, it is what you see. An even outline returns light evenly across all four quadrants instead of concentrating flash down a long axis, so the face stays consistently lit as the stone moves. It also sits properly square in a bezel or a four-claw setting, where an oblong stone would read crooked.
Cutting is a mixed style: a brilliant crown over a five-step pavilion, the crown facets returning light while the steps beneath hold the body colour. GFCO graded it Cornflower Blue, with Sri Lankan origin stated on the report.
7.09 by 7.05 millimetres — four hundredths of a millimetre from a perfect square.
Colour · Daylight · Cornflower Blue
| Family / Species | Natural Corundum |
| Trade Name | Sapphire |
| Weight | 1.92 carats |
| Colour (Daylight) | Cornflower Blue |
| Shape | Square Cushion |
| Dimensions | 7.09 × 7.05 × 3.85 mm |
| Crown Cut | Brilliant |
| Pavilion Cut | Step (5) |
| Origin | Sri Lanka (Ceylon) |
| Treatment | Standard Heat |
| Refractive Index | 1.760 – 1.770 |
| Specific Gravity | 4.09 |
| Laboratory | GFCO Gem Lab, Switzerland |
| Report Number | AAP92344-47403-2 |
| Report Date | 30 July 2026 |
Full Disclosure
The GFCO report records standard heat. Heating is the long-accepted, permanent and stable treatment applied to the large majority of blue sapphire on the market, and it is disclosed here in full. No other treatment is noted on the report.
GFCO does not assign a clarity grade to coloured stones. Under 80× magnification the laboratory recorded natural inclusions consistent with heated stones — the standard signature of the material and part of what identifies it as natural corundum rather than synthetic.
To the eye this sapphire is clean. Nothing registers as an inclusion at normal viewing distance and the crystal stays open right through the table. Inclusions exist under magnification — they do in every natural sapphire — but none of them is doing visible work here.
Every photograph and the video show the actual stone you will receive, shot in natural light without colour correction. Blue sapphire is notoriously difficult to photograph faithfully; the report reading of Cornflower Blue is the reliable reference for colour.
| Dispatch | Within 7 working days |
| Shipping | Free worldwide |
| Carrier | FedEx / DHL, fully tracked |
| Ships From | Bangkok, Thailand |
| Returns | 30 days |
| Packaging | Discreet, sealed and insured |
About The Facet HouseThe Facet House is a Bangkok-based supplier of natural diamonds and coloured gemstones. We buy at source across Sri Lanka, Madagascar and East Africa, and cut and grade in Bangkok — the centre of the world's coloured stone trade. Every stone is described exactly as it is. Treatments are disclosed, laboratory reports are supplied in the original, and nothing is claimed that a report does not support. |
Contact UsMessage us through eBay for additional photographs, video under different lighting, or a closer look at any inclusion. We reply within 24 hours, Bangkok time. Trade and volume enquiries welcome. If you are matching a pair, sourcing to a specific colour and size, or working to a client brief, tell us what you need and we will look through current stock. |