AI Appraisal Estimate

This lot consists of approximately thirty individual uncut, rough green emerald crystals displayed on white paper. The crystals exhibit a diverse range of sizes and shapes, with the group total weight noted on the paper as 310 carats. The stones display a characteristic vibrant, medium-to-deep green saturation with some variation in tone across the parcel. Many of the specimens retain their natural hexagonal prismatic habit, which is indicative of the beryl mineral family. The physical appearance of the stones is heavily included with visible internal fractures, veining, and cloudy white mineral matrix attachments, which are common in natural rough emeralds. The surfaces vary from relatively smooth crystal faces to jagged, conchoidal fractures where pieces have been broken from the host rock. There is no evidence of professional carving or polishing, suggesting these are in their raw, mine-run state. The paper beneath the crystals contains handwritten blue ink notations indicating a parcel weight of 310 ct and a numerical range of 2250 - 5000, which likely refers to an asking price or estimated value per carat or for the entire lot in a specific currency. The quality appears to be commercial grade suitable for cabochon cutting or mineral specimen collectors rather than high-end faceted transparency.

Upon visual examination of this parcel containing approximately thirty rough emerald crystals totaling 310 carats, I have identified characteristics consistent with natural emeralds, likely of Brazilian or Zambian origin. The stones exhibit the classic hexagonal prismatic habit of the beryl family and a saturated, medium-to-deep green hue. The clarity is typical for commercial-grade rough; they are heavily included with significant internal fracturing and minor host rock attachments, suggesting they are best suited for cabochon cutting or as mineral specimens rather than high-clarity faceting. Market demand for rough emeralds remains steady, particularly for parcels of this volume. Pricing is calculated at an estimated wholesale value of $15 to $20 per carat, as the heavy inclusions and 'garden' within the crystals limit the yield of transparent gemstones. The handwritten notation '2250-5000' on the paper may suggest a local currency valuation or a specific lot numbering, but my appraisal is based on current international market comparables for commercial-grade green beryl rough. Limitations: This appraisal is based solely on digital imagery. Definitive authentication requires physical inspection to rule out synthetic emeralds or green glass stimulants. I would need to perform a specific gravity test, examine the stones under a dichroscope, and use a Chelsea filter to confirm chromium content. Furthermore, microscopic analysis is necessary to determine if the stones have undergone significant clarity enhancement with oils or resins, which can impact value by up to 50%. Verification of the total 310-carat weight using a calibrated scale is also required for a certified valuation.