44.95 CTS PINK OPAL CARVING -TOP POLISH/LUSTER [T1]

Gegenstand Information

Abmessungen (mm) 35.7 x 14.5 x 19.3mm
Gewicht (Karat) 44.95 Karat
Wird bearbeitet...

PINK OPAL -AUSTRALIA

This is a natural untreated pink opal stone well carved and polished. It has interesting white potch lines in it and hand carved from one piece of rough.

This is what the West Australian mine dept says about Pink Opal

.

Pink opal ‘Pink opal’ is a prospectors’ name applied to a different variety of mookaite that outcrops as a persistent bed of extremely bright pink opalized radiolarite near Binthalya. At this site, pink opal is present as a dominant, horizontal bed within zones of coloured porcellanites located beneath a surface-brecciated zone in which angular fragments of pink porcellanite have been cemented by iron and silica solutions to produce an attractive pink breccia. The pink zone beneath has already been tested by trial mining to ascertain the extent and consistency of the pink, opalized material.

Examination of pink opal thin sections has confirmed the rock is radiolarite with a dominantly isotropic, finegrained mineral composition. Although not verified by XRD analysis, the pink opal’s physical and visible optical properties suggest it is predominantly opaline silica, having a lower bulk density than the locally porcellanized mookaite material. Pink opal commonly shows liesegang banding and often contains small vugs and fine fractures infilled with microcrystalline quartz. Microscopic, lustrous grains within the rock result from reflections of granular quartz where it has infilled pores and replaced radiolarian structures. In a manner similar to the origin of mookaite, the resilicification of the Windalia Radiolarite forming the pink opal porcellanite has resulted in a visually attractive, bright pink material displaying a high vitreous lustre. Pink opal is extremely hard and brittle with a conchoidal fracture . These properties allow pink opal to take a high polish, making it suitable for the production of colourful, polished tumbled stones, cabochons, and other artworks .

All weights and sizes below are approximate


PINK OPAL -AUSTRALIA

This is a natural untreated pink opal stone well carved and polished. It has interesting white potch lines in it and hand carved from one piece of rough.

This is what the West Australian mine dept says about Pink Opal

.

Pink opal ‘Pink opal’ is a prospectors’ name applied to a different variety of mookaite that outcrops as a persistent bed of extremely bright pink opalized radiolarite near Binthalya. At this site, pink opal is present as a dominant, horizontal bed within zones of coloured porcellanites located beneath a surface-brecciated zone in which angular fragments of pink porcellanite have been cemented by iron and silica solutions to produce an attractive pink breccia. The pink zone beneath has already been tested by trial mining to ascertain the extent and consistency of the pink, opalized material.

Examination of pink opal thin sections has confirmed the rock is radiolarite with a dominantly isotropic, finegrained mineral composition. Although not verified by XRD analysis, the pink opal’s physical and visible optical properties suggest it is predominantly opaline silica, having a lower bulk density than the locally porcellanized mookaite material. Pink opal commonly shows liesegang banding and often contains small vugs and fine fractures infilled with microcrystalline quartz. Microscopic, lustrous grains within the rock result from reflections of granular quartz where it has infilled pores and replaced radiolarian structures. In a manner similar to the origin of mookaite, the resilicification of the Windalia Radiolarite forming the pink opal porcellanite has resulted in a visually attractive, bright pink material displaying a high vitreous lustre. Pink opal is extremely hard and brittle with a conchoidal fracture . These properties allow pink opal to take a high polish, making it suitable for the production of colourful, polished tumbled stones, cabochons, and other artworks .

All weights and sizes below are approximate


Dieser Text wurde maschinell übersetzt. Original zeigen?
Sie haben nicht auf diese Auktion geboten.

Geschlossen

1 bid platziert

$1 redtruck691995
Auf die Beobachtungsliste Stelle eine Frage * Alle Preise in USD

Prüfungsinformationen

Mit dem Programm Opal Sheriff können unsere Mitglieder eine Prüfung für jede Auktion anfordern, die von einer unabhängigen Gemologist , die die Richtigkeit der Artikelbeschreibung und der Bilder bewertet.

Preise & Details

Gebotserhöhung $1
Startgebot $1
Auktions-ID 931499
Beobachter 1 beobachten
Gesehen 171 mal
Startet 6th Sep 2020 5:35pm PDT
Endet 4th Oct 2020 5:35pm PDT

Transportversicherung

Anbieter Versand Transit
FedEx $29.00 10 Tage
Registered Shipping $15.00 21 Tage
Versandversicherung aller Anbieter $7.00 (Optional)

Über das Volcanicopals

Sie können auch mögen