Round Brilliant Cut Colorless Gemstone

This item is a loose, colorless gemstone featuring a round brilliant-style facet arrangement. The stone is held against a human finger, suggesting a diameter approximately between 8mm and 10mm. Technically, the item exhibits several notable characteristics: the facets appear somewhat soft or rounded at the junctions, which can be an indicator of a non-diamond material like glass or a synthetic simulant, as diamonds typically maintain razor-sharp facet edges. There is a visible lack of high-dispersion 'fire' (spectral colors) in the central table, but various internal reflections suggest a medium-to-high refractive index. The stone appears to be eye-clean with no significant internal fractures (feathers) or carbon spots visible at this resolution, though the surface shows some smudging and potential minor abrasions on the crown facets consistent with handling. Without a thermal conductivity test or microscopic inspection of the girdle and culet, it is impossible to confirm if this is a natural diamond, lab-grown diamond, or a simulant like cubic zirconia or moissanite. The craftsmanship shows symmetrical faceting, but the lack of crispness in the light return suggests a lower grade of polish or a material with lower hardness than diamond. Due to the clarity and lack of color, if natural, it would fall into the D-F color range.