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Beautiful piece 1.45 Ct Natural Emerald From Swat Mined
- SKU
- 寸法(mm)
- 8.000 x 5.200 x 4.480mm
- 重さ (CT)
- 1.450
- Treatment
- No Treatment
- Shape
- Emerald
- タイプ
- Faceted
- Clarity
- SI
- 色
-
Zambia is considered the world’s second most important source of emeralds by value (after Colombia). The deposits are located near the Kafubu River in the Ndola Rural Restricted Area. Emeralds have been known from this region since 1928, but significant commercial production began only in the 1970s. As of mid-2004, most of the emeralds were being mined from large open- pit operations at the Kagem, Grizzly, and Chantete concessions. Economic emerald mineralization is confined almost entirely to phlogopite reaction zones adjacent to Be-bearing quartz-tourmaline veins that metasomatically altered Cr-bearing metabasite host rocks. Nearly all of the rough is cut in India and Israel. Zambian emeralds have relatively high R.I. and S.G. values, with inclusions typ- ically consisting of partially healed fissures, as well as actinolite, phlogopite, dravite, fluorapatite, magnetite, and hematite. They contain moderate amounts of Cr, Mg, and Na, moderate-to-high Fe contents, and relatively high Cs and Li. Although many features of Zambian emeralds are compara- ble to those from other commercially important localities, in many cases they may be separated by a combination of their physical properties, microscopic characteristics, and chemical composition.
- SKU
- 寸法(mm)
- 8.000 x 5.200 x 4.480 mm
- 重さ (CT)
- 1.450
- Treatment
- No Treatment
- Shape
- Emerald
- タイプ
- Faceted
- Clarity
- SI
- 色
-
Zambia is considered the world’s second most important source of emeralds by value (after Colombia). The deposits are located near the Kafubu River in the Ndola Rural Restricted Area. Emeralds have been known from this region since 1928, but significant commercial production began only in the 1970s. As of mid-2004, most of the emeralds were being mined from large open- pit operations at the Kagem, Grizzly, and Chantete concessions. Economic emerald mineralization is confined almost entirely to phlogopite reaction zones adjacent to Be-bearing quartz-tourmaline veins that metasomatically altered Cr-bearing metabasite host rocks. Nearly all of the rough is cut in India and Israel. Zambian emeralds have relatively high R.I. and S.G. values, with inclusions typ- ically consisting of partially healed fissures, as well as actinolite, phlogopite, dravite, fluorapatite, magnetite, and hematite. They contain moderate amounts of Cr, Mg, and Na, moderate-to-high Fe contents, and relatively high Cs and Li. Although many features of Zambian emeralds are compara- ble to those from other commercially important localities, in many cases they may be separated by a combination of their physical properties, microscopic characteristics, and chemical composition.
配送業者 | 発送先:国 | その他の国への配送 |
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Standard Shipping - Tracked | $8.00 / :日日 | $15.00 / :日日 |
:国
:数量以上のアイテムを含む注文では、:プロバイダーは $10.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $20.00 に割引されます
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FedEx | $35.00 / :日日 | $35.00 / :日日 |
:国
:数量以上のアイテムを含む注文では、:プロバイダーは $35.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $40.00 に割引されます
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ネガティブ
Seller has used strong filter on the seller image. What I have received is not as vivid red as seller images shown. Very disappointed. Wont consider this seller anymore.
なぜユーザーは自分自身を上回る入札をするのでしょうか?
入札する場合、これはユーザーが製品に入札する意思のある最大金額です。その後、当社のシステムがそのユーザーに代わって自動的に入札し、最高入札者としての地位を維持するために、指定された最大値まで入札額を段階的に引き上げます。
「自動入札」を示すアイコンがある場合、システムが最高入札額に基づいてユーザーに積極的に入札していることを意味します。これは、ユーザーが自分自身を上回って入札しているように見えるかもしれませんが、ユーザーの上限を反映するためにシステムが入札を更新した結果にすぎません。