- Stone12
- Reports2
5.83 Ct. Multi Color Boulder Opal (Ironstone Opal) from Australia
This loose stone is available to ship now
Item ID: | K12747 |
|---|---|
Dimensions (MM): help | Length: 15.56 Width: 13.3 Height: 3.27 |
Weight: | 5.83 Ct. |
Color: help | Multi Color |
Color intensity: help | Intense |
Clarity: help | Not Applicable |
Shape: help | Freeform |
Cut: | Polished |
Cutting style: | Tablet |
Enhancements: help | No Enhancement |
Origin: help | Australia |
Per carat price: help | $380 |
One opaque 5.83 carat freeform Boulder Opal, Ironstone Opal, presents as a tablet cut specimen with dimensions of 15.56 x 13.30 x 3.27 mm. The cutting style is Tablet, with a polished cut and an excellent polish that accentuates the gem surface. Color intensity is recorded as intense, with dominant blue and green play across the opal surface and localized darker ironstone matrix visible in contrast. The piece is natural, with no enhancement, and its origin is Australia. The freeform shape preserves a substantial portion of the original ironstone host, providing a durable backing and visual depth that are characteristic of boulder opal material. Weight, dimensions, cutting style, polish, and enhancement status are all documented to industry standards for accurate appraisal and setting decisions.
Inclusions within this Boulder Opal, Ironstone Opal, function as unique identifiers that contribute both to provenance and to individual character. Natural ironstone pockets and veins occur as dark areas against the play of color, and these matrix features are stable inclusions that help confirm natural formation in an iron rich host. Fine silica layering and subtle potch banding appear as areas of reduced play, and small fissures or growth lines are confined to the host matrix rather than to the surface polish, preserving overall durability. These internal features record the gemological history of the stone, distinguishing it from treated or assembled material, and they are consistent with known Australian boulder opal formation patterns. For practical use, the ironstone host increases mechanical support for settings, and the tablet cut provides a low profile that reduces stress on thin edges where inclusions meet the surface. The Natural Gemstone Company documents these attributes to assist gemologists, designers, and end users in understanding the stone as a singular natural specimen, and to support appropriate setting and care recommendations based on its structural and optical characteristics.
