New obicular jasper

michael B · **Joined:** Wed Sep 18, 2013 4:10 am **Posts:** 22

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I have been a gemstone carver and lapidary artist since the early 2000s, I also love to explore and fossic for gems, I live in the Tamworth region of NSW Australia, on my property I recently found a deposit of obicular jasper in ironstone base, magnetic. Magnatite?. And may also have hematite, my property is on a section of the peel fault area some input here would be great about how it formed would be great.

glhays · **Posted:** Wed Sep 21, 2022 6:39 pm

Very cool.... looks like it will make some very nice cabs.

Shifter55 · **Joined:** Fri Dec 25, 2015 8:31 pm **Posts:** 276

definitely interesting stuff, given the green areas, any connection to bloodstone? it looks a lot less agatised/more iron rich.

1bwana1 · **Joined:** Thu May 12, 2016 2:18 am **Posts:** 1565

Are you sure it is Chalcedony? It needs to be Chalcedony to apply the term Jasper to the stone.

Do us a favor. Go out to a piece of white concrete and rub the stone across it. Then tell us what color the line the stone leaves on the concrete is.

Thanks,

Steve

Stephen Challener · **Posted:** Wed Sep 21, 2022 10:04 pm

I'd think there'd need to be a decent amount of silica in there to dilute the hematite (and/or other iron oxides/hydroxides but probably hematite) enough to get that particular orange color. Hard to say without putting it under the microscope. Defining jasper rigorously is not an easy task in general (even 'chalcedony' is used to mean different things in different contexts after all).

michael B · **Joined:** Wed Sep 18, 2013 4:10 am **Posts:** 22

Thanks for the help in identifying my stone, The orange obicular stone has a hardness of around 7, there is heaps of quartz - chalcedony in the mix, I also found bloodstone attached to this. I will have it tested by a geologist, another picture of the bloodstone, not muck green in the mix. I will do the streak test on a white brick on the black backing stone.

glhays · **Posted:** Thu Sep 22, 2022 1:30 pm

The red/orange areas very similar to some of old Richardson Ranch and Praisly Bloom agates from here in the USA.

michael B · **Joined:** Wed Sep 18, 2013 4:10 am **Posts:** 22

Thanks for the reply. Ok so I done a streak test on the black backing stone, streak is black and it’s magnetic, magnetite ?, and I scratch tested it, 6 to 6.5, approx. But does seem to have a silica mix in the black, the orange obicular material scratches the streak plate, left no colour on the plate so it’s silica- chalcedony quartz.

1bwana1 · **Joined:** Thu May 12, 2016 2:18 am **Posts:** 1565

Well for sure that is not a typical Hematite streak color.

michael B · **Joined:** Wed Sep 18, 2013 4:10 am **Posts:** 22

I went digging yesterday, one of today’s cuts.

mehoose · **Posted:** Sat Jun 10, 2023 8:35 pm

Gorgeous material, Mick! I need to camp out in your back yard. O:)

Finally have a cabber again and should be sourcing water supply today..any chance of buying a few yummy slabs from you in a couple of weeks?
Just want to break the wheels in first and get back into the 'zone' before touching the good stuff.... which I would be so tempted to do if here now.
Shoot me a pm either way, yay or nay, here or on ALF.

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