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Anhänger Boulderopal / neu

Gefasst in 925. Sterlingsilber 

Inklusive Lederband (80 cm)

Gewicht: 7,25 g (ohne Lederband gewogen)

28,7 mm x 18,2 mm x 6,4 mm

Neu und ungetragen



Mit Boulderopal werden Edelopale bezeichnet, die in Adern und Rissen des umgebenden Muttergesteins eingebettet sind. Bei diesem wertvollen Edelstein aus dem Outback gehört das Muttergestein, die Matrix, dazu. Der edle Opal lässt sich nicht von seinem Muttergestein trennen. Der Anteil des Edelopals auf der sichtbaren Oberfläche des Boulderopals bestimmt den Wert des Edelsteins. 

Boulderopale kommen ausschließlich in Queensland (Australien) vor. In einem 300 km x 1000 km breiten Verbreitungsgebiet werden an verschiedenen Fundorten abbauwürdige Boulderopal - Vorkommen abgebaut. Dieser Opal Gürtel entspricht der kreidezeitlichen Winton – Formation. Ab der ausgehenden Kreidezeit verwitterten Ablagerungen aus Flüssen und Seen und bildeten eine eisenhaltige Zone, in der sich in Grundwassernähe kieselsäurehaltige Ausfällungen aus den darüber liegenden Schichten in Rissen und Spalten sammelten. Dort verdichteten sie sich durch Austrocknung zu Gel und schließlich zu sekundär entstandenem Opal.

Versand als versichertes Einschreiben.

Australia

Boulder Opal Pendant / new- 7.25 g - (1)

Minerals & Meteorites

Reserve price

No reserve price

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Closing date

Sunday

19 April

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tomorrow

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Material

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.925 silver

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Gender

Unisex

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Condition

As new - unused

Natural

Excellent condition - barely used with minimal signs of wear

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Excellent condition

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Good condition - used with some signs of wear

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Very good condition - slightly used with small signs of wear

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Very good

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Fair condition - used with visible signs of wear

Excellent condition: barely used with minimal signs of wear

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Good

Vintage - used with visible signs of wear

Good condition - used with small signs of aging & blemishes

Fair condition

Period

Paleogene, Eocene (56 - 33.9 million years)

2020+

2026

1850-1900

Paleogene, Oligocene (33.9 - 23.03 million years)

Paleogene (66 - 23.03 million years)

1970-1980

Neogene, Miocene (23.03 - 5.33 million years)

Neogene (23.03 - 2.58 million years)

2024

Late 20th century

1990-2000

Quaternary, Holocene (0.0117 - 0 million years)

Cretaceous, Upper (100.5 - 66 million years)

Cretaceous, Lower (145 - 100.5 million years)

Devonian, Lower (419.2 - 393.3 million years)

Ordovician (485.4 - 443.8 million years)

Mesozoic (251.9 - 66 million years)

2020

2023

2025

20th - early (WW I)

Pearl

Opal

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Certification

No laboratory report

GEM-TECH Istituto Gemmologico

Gem research Swiss Lab (GRS)

Antwerp Laboratory for Gemstone Testing (ALGT)

Anchor Cert

Minerals & Meteorites

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Boulder Opal Pendant / new- 7.25 g - (1)

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