R - Rare Nut Opals

What is a rare Yowah Nut Opal?

Well, there is no better way to understand than to view these shore videos:

Smithsonian
https://www.youtube.com/watch?v=5bKolysDxio
Opal Auctions
https://www.youtube.com/watch?v=XPFKwJoVjNY
https://www.youtube.com/watch?v=oTODP36yBds
Paul Edgren
https://www.youtube.com/watch?v=5jevlTGKfy8

"A feature of the Yowah field is the occurrence of precious opal in siliceous ironstone nodules generally referred to as Yowah Nuts. These nuts range from about 5mm to 200mm across, have a spherical or ellipsoidal shape, and show alternate concentric rings or bands of light- and dark-brown siliceous ironstone. There is sometimes a kernel of precious opal, which is the main source of the gem." - Paul Edgren

This Cache

You will find this cache in a rock cairn - a pile of stones marking the location of the cache

This cache is part of the Opal Muster Tail established for the Queensland Outback Geocaching Muster (QOGM) 2021 Paroo - one of fifteen caches each of which contain part of the coordinates for the Mystery Cache "Opal Muster Tail Final"

Each cache contains a logbook for you to sign.  In addition, there are some "opals" in each cache which must be opened to discover which "opal" has the clue to the final.  Record your clues to discover the location of the cache "Opal Muster Tail Final".

The image below is how the original cairn for this cache was constructed. PLEASE RETURN IT TO THIS STATE AFTER YOU HAVE REPLACED THE CACHE.  

Keep the cache covered but away from the rocks Their summertime heat could deform the plastic.  Especially the lid - keep the rock cover ABOVE the cache so it is NOT touching the lid.  Thank you for helping prolong the life of this cache.

Happy Fossicking!