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          $74.00 USD
          Price

          FIREY WELO OPAL-FACETED SILVER RING. RING SIZE 7.5 [SOJ1089]

          3542
          4

          SKU
          Dimensions (mm)
          9.000 x 9.000 x 4.000mm
          Weight (cts)
          28.000
          Ring Size
          7.5
          Colours


          WELO OPAL RING

          This is a natural untreated stone  mined in Ethiopia and set in silver and ready to wear.There is a good display of fire from all directions.

          Faceted stone

          Bezel set to protect the stone.

          Stamped 925

          The workmanship is excellent

          Weight of silver and stone 28.00 cts[app]

          Size of stone 9 x 9 mm [app]

          Ring size: 7.5 [USA]

           

          Table of Ring Sizes:



           

          We recommened you dont wear the ring when gardneing or when washing.The stone is hydrophane so it will appear brighter in times of low humidity

          For polished stones and rough visit out sister site "VOLCANICOPALS"

           

          New Play-of-Color Opal from Welo, Ethiopia

          A new source of high-quality play-of-color opal was discovered in early 2008 in Welo Province, Ethiopia, about 500 km north of Addis Ababa. This deposit is geographically distinct from the Mezezo deposit in Shewa Province, which was discovered in the early 1990s (see, e.g., Spring 1994 Gem News, pp. 52–53).

          These contributors examined a parcel of about five rough and 30 cut Welo opals. The cabochons showed good play-of-color ; the vast majority were white and transparent, but some had a bodycolor varying from light yellow to dark “chocolate” brown. Compared to Mezezo opals (e.g., J.-P. Gauthier et al., “L’opale d’Ethiopie: Gemmologie ordinaire et caractéristiques exceptionnelles,” Revue de Gemmologie a.f.g., No. 149, 2004, pp. 15–23), those from the new deposit generally appear much whiter. We noted all spectral colors in the play-of-color in our samples. Most of the cabochons were similar in appearance to opals from Australia or Brazil. However, many samples displayed a columnar structure of play-of-color opal within common opal (figure 2), as first described in material from Mezezo (again, see Gauthier et al., 2004). This feature is only very rarely observed in opals from sources outside Ethiopia.

          The hydrostatic SG of the opals ranged from 1.80 to 2.10. This broad range is in part due to the high porosity of some samples, as revealed by a significant weight increase after immersion in water (up to 8%). Fluorescence varied from inert to moderate yellowish white to both long- and short-wave ultraviolet (UV) radiation. Samples that were inert displayed an unexpected greenish phosphorescence of moderate intensity. No luminescence was observed in the opals with a yellow-to-brown bodycolor, even the light ones; these darker bodycolors are probably due to the presence of iron, which quenches luminescence. The yellow-to-green luminescence is likely due to the presence of uranium (E. Gaillou et al., “The geochemistry of gem opals as evidence of their origin,” Ore Geology Reviews, Vol. 34, 2008, pp. 113–126). Fourier-transform Raman spectra were obtained for several samples using a Bruker RFS 100 spectrometer. All spectra were consistent with opal-CT, with Raman bands at about 1070, 780, 670, and 345 cm-1, and water-related bands at about 3200 and 2950 cm-1.

          Welo opal is found in volcanic rock, possibly a rhyolite. The rough samples we examined consisted of opal (either common or play-of-color) cementing fragments of the host rock. By contrast, opal from Mezezo fills cavities in rhyolite, forming nodules. Despite these differences, the fact that columnar structures are seen in opals from both deposits (but very rarely from elsewhere) seems to indicate similarities in the conditions of their formation.

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          Australia
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          Rest of the world
          Registered Shipping is discounted to $16.00 on orders with 2 or more items

          FIREY WELO OPAL-FACETED SILVER RING. RING SIZE 7.5 [SOJ1089]
          Qld, Australia
          Owned by sedaopals

          • alp9ne
            alp9ne
            Positive

            Arrived quickly and was as described. I'm very happy with this purchase.

          • pahobbs
            pahobbs
            Positive

            The opal arrived much faster than expected and is beautiful. Wonderful seller communication. Thank you!

          5%
          Coupon code SEDADEALS
          Save $3.70 on this product
          Valid Until
          2nd Jun 2025

          Audit

          The Opal Sheriff program allows our members to request an audit on any product, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.

          Shipping Details

          Shipping:
          $16.00 21 days via Registered Shipping
          Ships from:
          Australia

          Payment Options

          • paypal
          • stripe
          • gempay
          This seller adds 10.00% tax to transactions in Australia.

          Overview

          Listing Type : Standard
          Product ID : 1173722
          Starts : 8th May 2025 03:43 pm PDT
          * All prices are in USD