shiny rocks

[treasureman]

i dont think so. i cant see any bombs holes anywhere.
they are not magnetic so not iron.
maybe your right are thread for screws.
but what is the rocks stuck in the grooves?
could the grooves be from an old mining tool, like a chissel and hammer . knock knock knock which cuts through and removes the mineral easier?
or maybe your right and debrit from bomb range.
but near the ocean i think their would be big bomb explosion holes around. which are no signs of this

 

[aussiefarmer]

I am betting on bronze , what from I don't know they could be from a test bomb the cracks and the shapes are what I am going off, the un shinny bits say bronze to me.

 

[treasureman]

here is a bronze bomb

 

[blisters]

The reason I think it is brass is the pink tinge comes from copper. The acid would have dissolved the zinc or other mineral leaving the copper film. If you polish it the copper will be removed and it will return to the colour of brass. You can chemically test for copper turning it green. The piece looking like a thread, and I would say it is, also contains what looks like green copper oxide. Whether all the pieces come from the same object or not they appear to be the same or similar in composition.
Jon

 

[blisters]

I also noticed that more than one piece has the thread pattern. Are they the same pitch and do any of the pieces match up either edge wise or the lip pattern? The long thread piece on the right with the green oxide and the piece above it look like they have a similar edge pattern and may butt up to each other.
Jon

 

[treasureman]

hi blisters
yes the two pieces there that have similar grooves were found an inch apart or pretty much in the same hole.
after scratching the porcelain again its actually yellow. however since cleaning and shining they have slowly become less shiny however the marks where i scratches porcelain are bright yellow/gold colour.
nevertheless when i get some spare time ill get them tested. out of curiousity probably brass lol

 

[casper]

....some pieces do have the look of shrapnel.

casper

 

[blisters]

Where did you find them treasureman?

 

[silver]

Would have been in the ground somewhere blisters. :lol:

 

[backcreek]

I could be wrong but I recon it's bronze and I'm thinking fragments of an early exploded firearm or small cannon. In some of the earlier picks some pieces look to have a cylindrical bore.

When firearms technologies reached Europe, many of the early European firearms were also made of bronze. Bronze cannon continued to be used in America as well. In fact, during the Civil War, a majority of the field artillery used by both sides were made of bronze. While cannons made of iron were also invented, people continued to use bronze cannons for a while after for several reasons. Even though cast iron guns can withstand greater amounts of gunpowder and thereby have greater range, bronze cannons are lighter for the same caliber. Therefore, they were preferred for campaigns, as they could be moved around more easily. On ships, bronze firearms (both small arms and cannon) were preferred over iron mainly because bronze doesn't corrode as easily in the presence of sea water.

A pair of bronze barreled travelling pistols from England circa 1803-1820

Gunmetal is one of the strongest types of bronze used to make guns. It dates back to the middle of the 19th century, when it was discovered that adding a little bit of zinc to bronze improves its casting characteristics. The British Admiralty gunmetal formula was 88% copper, 10% tin and 2% zinc, whereas the US Ordnance formula was 88% copper, 8% tin and 4% zinc.

Interestingly, even though literature from the 18th and 19th centuries refer to brass firearms, many of these were actually made of bronze (i.e. alloy of copper and tin) rather than brass (which is an alloy of copper and zinc). Examples include the Henry rifle and several confederate weapons, which are often mentioned to have brass frames, when they are really more bronze than brass.

 

[treasureman]

fascinating backcreek and you have inspired me to go back to the area with my new detector and suss it out further. if your are right, and this is evidence of early 1800's activity then it might be worth another stint.
the rocks were found on and off over several different trips to the same area (huge area) but very close to the ocean, in the bush, which i can tell of old very old paths used before development happened.
maybe there was a gun battle.
in my finds thread, ive found numerous 1800's lead bullets that may be in the same age bracket as the pistols you have posted.
even one spot relatively close by i have found 40+ musket balls. but unfortunately no coins or jewlwerry from this era, apart from a very old copper females ring.
i hope you are right because that would be very interesting.
the first piece of rocks i shined in the photo next to the gold coins looks very familiar to the shape of guns there.
thank you for your interest
usually brass or bronze show up 70+ on my detector
when i wave the rocks all together by the detector its read 29-32 so that is interesting also. nickel perhaps

 

[backcreek]

Hay TM,
You may be onto something significant, there may be some history in the area that remains unknown.
Well worth a further look, maybe with a 7000 if you can get a hold of one.
What machine have you been using?

 

[treasureman]

holy smokes a minelab 7000, very expesnive machine backcreek. why do you suggest this metal detector?
at the time i found this debrit i was using a garret at gold. since then i have a fisher f75 ltd which is much much deeper than the gold.
and i have not been back to the spot with this new detector. which may be worth it like you say.
and may i ask why you say 'onto something significant, there may be some history in that area that remains unknown'?

 

[backcreek]

This is the reason I suggested the 7000.

[video=480,360]https://www.youtube.com/watch?v=y5Ef9AgsN-c[/video]

You may be able to hire one.

"and may i ask why you say 'onto something significant" well the signs are there according to your previous posts.

 

[treasureman]

thats incredible. looking forward to see what is down therE!

 

[GallicProspector]

I am sure it is the remains of a bomb shell (mortar or cannon), it is very similar to the I used to find in France.

 

[treasureman]

Here are some interesting angles . Each piece is quite weighty compared to lead Say

 

[treasureman]

I mean for a ww2 bomb they must have used premo materials for the casing

 

[treasureman]

Here is one pieces lightly scraped of rough porcelain . Leaves gold shiny trail and to me looks like shiny gold inside. weird

 

[treasureman]

And a bit harder