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FIREY WELO OPAL SILVER RINGS 26.45 CTS SIZE 6 [SOJ57]

3825
11

SKU
寸法(mm)
7.000 x 7.000 x 5.000mm
重さ (g)
5.290
Ring Size
6

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.

Stamped 925

The workmanship is excellent

Weight of silver and stone 26.45 cts[app]

Size of stone 7 mm [app]

Ring size 6 [USA]

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.

配送業者 配送先Australia その他の国への配送
FedEx $12.00 / 3 $39.00 / 10
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世界のその他の地域
FedEx 、 2以上のアイテムを含む注文で$39.00に割引されます
Registered Shipping $9.00 / 7 $16.00 / 21
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Registered Shipping 、 2以上のアイテムを含む注文で$9.00に割引されます
世界のその他の地域
Registered Shipping 、 2以上のアイテムを含む注文で$16.00に割引されます

sedajewelery
sedajewelery
Welcome to Seda Jewelry, where natural beauty meets exquisite craftsmanship. Led by Paul Sedawie, a distinguished member of the International Coloured Stone Association (ICA) and former president of the Opal Association, our store showcases a stunning collection of jewelry adorned with all-natural gemstones. With a passion for sourcing the finest gemstones from around the world, Paul ensures that each piece of jewelry in our collection is as unique as it is beautiful. From vibrant opals to dazzling diamonds, every gemstone is hand-selected for its exceptional quality and beauty. As a testament to our dedication to quality, all jewelry at Seda Jewelry comes with a money-back guarantee, providing you with peace of mind with every purchase. Explore our collection and discover the perfect piece to add a touch of natural elegance to your style.
Mermaid Beach 、 Australia
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2963フィードバック

  • helmrey
    helmrey
    ポジティブ

    Very nice pendant. Good seller

  • helmrey
    helmrey
    ポジティブ

    This is more of a piece of art. I will maybe look at purchasing another piece. Good seller

  • helmrey
    helmrey
    ポジティブ

    Much brighter in person. Very attractive. Good seller

  • ec780505
    ec780505
    ポジティブ

    I have successfully received the item, and it matches the description and images perfectly. Thank you for delivering exactly what you promised!

10%
クーポンコード JEWELERYJOY
まで有効
2nd Jan 2025

監査

この製品はGemstone Sheriffによって監査され、次のことが判明しました:
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Comments

The Verified Seller has provided accurate and complete information for this item

この監査は3年前にリクエストされました
最終更新3年前

発送詳細

配送:
$16.00 21日 ( Registered Shipping経由)
発送元:
Australia

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この販売者は、 Australiaでの取引に10.00%税金を追加します。

概要

リストタイプ : Standard
製品番号 : 58936
始まります : 19th December 2024 05:49 pm PST
* すべての価格はUSDで表記されています