You see the small circles those are hammer drill marks in multiple spots that didn't go no where
Hammer drill?
Masonry bit will spin on metal
So that wouldn't drill into the item that you are showing
To state that the hammer drill didn't go no where shows me also you have limited knowledge on the use of a drill and the application of different drill bits.
The item you claim " Platinum " has the hardness of 4.5
Drill bits come in at 8.5
So in reading your claims that this item is Platinum you haven't done any suggestions suggested by the readership.
You state what it looks like in post #53 -so it was cut
Take a piece to a jeweller or and other testing facility (your reluctance makes the readership wonder why not)
You acid test proves nothing-do as Emil suggested in post #55
The weight of your item is 28lbs
Your measurements in post #20 state approx. 12" X 12" X 4" (hard to measure correctly)
So lets play the weight game: 576 cu.in.
Here is the weight of aluminum
If we take your measurements at 50% we have the answer to what it is-ALUMINUM
Your claim of Platinum would have the weight of the following
Now reduce that by 50% in size and still it would weigh 223 pounds
That is nearly 8X what you are claiming for its weight-so it's not Platinum.
In conclusion I would say that you have a 28lb. aluminum sow (sow is used loosely here)
From seeing sows at refineries, back yard sows, scrap yard sows, I would put my dollar on that you have just that but in a different shape.
Seen thousands of tons of aluminum in my career and good amount of PMs. (That was my business nonferrous/alloys/PMs recycling)
Honestly your piece is worth very little as it has been remelted-the problem lies with contents of item (contaminated with something else that isn't what the exterior states in a test)
If I bought this item off you for $10
My brokers would not of bought this off of me because of that very fact.
So it would be thrown in a bin for export to China and sold to the broker for $12
That's reality of what you have-no more/no less.