Natural Diaspore · 0.66 ct · Cushion · needle inclusion · Unheated

This natural Diaspore weighs 0.66 carat and is fashioned in a compact cushion mixed cut, displaying an unusual yellowish-green body colour together with a prominent natural acicular needle inclusion.

Measuring approximately 6.2 × 5.0 × 2.5 mm, the gemstone presents a balanced cushion outline with a transparent body that allows its internal structure and distinctive inclusion pattern to remain clearly visible.

The stone displays a yellowish-green colour, giving it a fresh and uncommon appearance compared with the more familiar yellow, brownish or colour-changing Diaspore encountered in the gemstone trade.

Its clarity is comparable to an I3 profile, with prominent natural inclusions readily visible within the transparent material. The most distinctive internal feature is a clearly observable white acicular needle inclusion, which forms an important part of the individual gemmological character of this specimen.

Diaspore is a natural aluminium oxide hydroxide, with the chemical formula AlO(OH). Gem-quality transparent material suitable for faceting is relatively uncommon, making well-formed faceted Diaspore an interesting addition to a mineral or gemstone collection.

The cushion mixed cut is assessed as Good, providing an effective face-up presentation of both colour and internal structure. Fair symmetry introduces some variation in facet alignment, while Fair to Good polish supports a pleasing surface finish and a Good vitreous luster.

The transparent body allows light to interact with both the facet structure and the internal needle inclusion, producing a distinctive appearance that differs from cleaner Diaspore specimens. In this stone, the natural inclusion is an important identifying and visual characteristic rather than a hidden internal feature.

There are no indications of heating and no indications of any other treatment. The gemstone is therefore presented with its naturally observed colour, transparency and internal characteristics without documented enhancement.

With its unusual yellowish-green colour, transparent body and clearly visible natural needle inclusion, this 0.66 ct Diaspore offers distinctive gemmological character. Its uncommon faceted presentation makes it an appealing specimen for collectors or for an individual custom jewellery design where its natural internal structure can remain part of the visual identity.