Larger Rough/Rubbed Mintabie Opal/Potch Parcel 1545cts Slight/No Fires Practice/Specimens

I have for sale a Larger Rough Opal/Potch Parcel from Mintabie, Australia. These weigh 1545cts in total. They are Mixed Black/Grey and Light/Crystal Material.  Some skins/sand in places too. These have Slight Fires in places, not in all, Practice/Lower grade material, Specimens and similar. A few do have bits of colour but not many!! A few are Jet Black potch here, so great for doublet/triplet backing material.  Lots to look at,.,.,. Thanks for checking them out,.,.,. :)