Four faceted yellowish-green gemstones consistent with peridot

This set consists of four oval-cut faceted gemstones displaying a yellowish-green hue. The stones exhibit a color profile that is stylistically consistent with peridot, though they could also be peridot-style synthetic glass or other green minerals. The owner identifies these as peridot gemstones measuring 12.77 mm (approximately half an inch) each; however, these measurements and the mineral identification are unverified as the items cannot be physically weighed or tested for refractive index and gravity. Each stone appears to be loose and unmounted, featuring various facets that create a play of light and internal reflections. The clarity appears relatively high from the image, though internal inclusions cannot be ruled out without magnification. There are no visible maker's marks or laser inscriptions identifying the origin or treatment of the stones. Condition appears good with no obvious chips or abrasions visible at this resolution, though the surface should be inspected for wear. The identification is based on visual color and cut, as no certificates of authenticity or laboratory reports are present in the photograph.

I have evaluated the image of four oval-cut yellowish-green gemstones. The owner identifies these as peridot measuring approximately 12.77mm each. Based on the visual evidence, the stones appear to be loose, faceted, and consistent with the color profile of peridot; however, without physical testing such as refractive index measurement or microscopic inclusion analysis, I cannot determine if these are natural minerals or synthetic glass/simulants. The clarity appears high from the image, but I can't verify the presence of internal characteristics that would normally confirm natural origin. The value range of $400 - $800 assumes these are natural, untreated peridots of the size described, as stones exceeding 10mm often command higher prices due to scarcity. This estimate reflects general market behavior for loose gemstones of this type. If physical inspection reveals these are synthetic glass or 'peridot-style' simulants, the value would likely drop to a nominal range of $20 - $50 for the set. Conversely, if laboratory testing through an institution like the GIA were to confirm they are natural and identify a specific high-value origin, the value could increase toward the upper end of the provided range. A definitive valuation would require an in-person gemological examination to verify weight, exact dimensions, and mineralogical identity, as photo analysis alone cannot differentiate between natural and lab-created materials.