SHOP 100,000+ BUY IT NOW OPALS
OR TRY OUR AUCTIONS WITH NO BUYERS FEES
100% NATURAL OPALS & VERIFIED SELLERS
Black Opals Gemma AI Opal 101

You have not bid on this auction.

Current Bid
1
Bids
Closed
22/10/2025 02:53 pm

21.1Cts Clam Shell Opalized Fossil FO-3265 fossil opals

1 bid
132 views
0 watching
Details
SKU
FO-3265
Dimensions (mm)
25.2 x 21.5 x 9.5mm
Weight (cts)
21.1
Shape
Freeform
Type
Specimen, Polished
Colours
Description

CLAM SHELL OPALIZED

COOBER PEDY, AUSTRALIA


NATURAL SHELL

OPALIZED FOSSIL

BEAUTIFUL COLOURS

An opalised clam shell is a fossilized clam shell that has been replaced or filled with precious opal, typically found in Australia. This rare natural phenomenon combines paleontology and gemology, making such specimens both scientifically significant and visually stunning.

Key Features:

  • Material: The original shell is preserved in silica, and over time, this silica becomes opal.

  • Location: Most commonly found in Lightning Ridge, Coober Pedy, and White Cliffs, Australia.

  • Color: May display vibrant play-of-color (iridescent rainbow-like hues), especially in precious opal forms.

  • Age: Often around 100 million years old, dating back to the Cretaceous period.

Why They're Valuable:

  • Scientific value: They preserve details of ancient marine life.

  • Aesthetic value: Iridescent, colorful opal makes them highly sought after by collectors and jewelers.

  • Rarity: Opalized fossils are extremely rare, especially complete or colorful ones.

TRADING AS - TRUEBLUEOPALS PTY LTD / LIGHTNINGOPALS LLC

Shipping
Shipping provider Shipping to Australia Shipping to rest of world Combined Shipping (Australia) Combined Shipping (rest of the world)
Standard Shipping - Tracked
/ 3 days
/ 21 days
on orders with 2 items or more
on orders with 2 items or more
FedEx
/ 3 days
/ 7 days
on orders with 2 items or more
on orders with 2 items or more
DHL
/ 14 days
/ 14 days
on orders with 2 items or more
on orders with 2 items or more
Store
21.1Cts Clam Shell Opalized Fossil FO-3265 fossil opals
Qld, Australia
Owned by fossil opals
Recent Feedback
  • tropical-drew
    tropical-drew
    Positive

    Paid and shipped - no feedback left after 100 days

  • altemagic
    altemagic
    Positive

    Thank you for the interesting item!

  • altemagic
    altemagic
    Positive

    Thank you for the interesting item!

  • ntasky87
    ntasky87
    Positive

    Love this little fossil! The colours really pop and is so much better in person!! Thank you.

  • tropical-drew
    tropical-drew
    Positive

    Paid and shipped - no feedback left after 100 days

Bids History (1)
tropical-drew
tropical-drew
3 months ago
Purchased from this seller previously
Automatic Bid

Why are users outbidding themselves?

Automatic Bid icon
Automatic Bid

When a bid is placed, this is the maximum amount a person is willing to bid for the product. Our system will then automatically bid on behalf of the bidder, incrementally increasing the bid up to the maximum to maintain their position as the highest bidder.

When there is an icon indicating 'Automatic Bid', it means our system is actively placing bids for the bidder based on their maximum bid. This may appear as if bidders are outbidding themselves, but it's simply a result of the system updating the bid to reflect the bidders maximum limit.

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

Costs:
Transit:
21 days via Standard Shipping - Tracked
Ships from:
Australia

Payment Options

  • stripe

Overview

Listing Type : Standard
Product ID : 1633895
Estimated RRP :
Starting Bid :
Starts : 8th October 2025 09:37 pm PDT
Ends : 22nd October 2025 02:53 pm PDT
* All prices are in USD

You may also like