FMF - Friends of Minerals Forum, discussion and message board

[batua]

Hello All
Please Help Me To Identify This Stone.
Thank You

Note :
1. This Is NOT A Slag.
2. Density Around 3.5 Gr/Cm3
3. Very Opaque. Tested By Normal Flashlight And UV Flashlight
4. Hard To Cut And Polished Even Using Angle Hand Grinder
5. Very Strong Heat Resistance
6. Do Not Attract To Magnet
7. If Need More Information To Identify It Just Please Ask Me

[batua]

XRF Result

[batua]

Fragments #1

[batua]

Fragments #2

[batua]

Fragment Polished with Angle Hand Grinder Follow Natural Slope Of The Stone

[batua]

Surface Zoom

[Matt_Zukowski]

Are you sure of the XRF data? Those are huge concentrations of REEs. Perhaps someone else can correct me but I find it hard to believe that you found a natural rock with those concentrations. Moreover, it seems doubly hard to believe that such a rock would be so hard. Until we are sure you have good XRF data, we can only wildly speculate by giving you minerals with the contents you specify, but who knows without knowing your data is good.

There are a number of universities in Jakarta. I recommend that you bring the rocks to a geology department in one of them, show them your XRF data, and ask them what you have. If you can, bring the XRF with you to see if you are using it correctly.

[batua]

Another Pict

[James Catmur]

I agree. More pictures will not enable us to identify it

[Peter Megaw]

With that much Thorium it should be quite hot...

Unless this is some outrageous variety of something like Calzirtite, if the numbers are real I suspect an industrial product of some kind

[Tony L. Potucek]

Batua,
You posted this stuff on Mindat several days ago. Are their answers and possible identifications not enough?

[Pete Richards]

To all appearances this is a rock, not a single mineral. In addition to other problems/questions about the XRF data, it is at best a bulk composition that will not correspond to any particular mineral except by chance. The photos are inadequate to infer much if anything about the minerals present in the rock. One spot apppears to perhaps be a sulfide mineral.

This forum is focused on minerals, and we do not have much expertise on identification of rocks.

[James Catmur]

MinDat said 'slag' so he is hoping we will say something else?

[batua]

Hello,

This Stone Found In Bangka Island Of Indonesia.. A lot Of REE.Deposit In That Island. You Can Google It If You Want. And Again I Am Very Sure This Is Not A Slag ( 4 Comments In Mindat Said It Slag But I Dont Want Argue With Them ). XRF Result Is Legit. But It cannot Detect Carbon And Boron.
But Is That Possible Leading To Yakutite ... Or Carbonado ? And REE Are Mineral Inclusion Of It ?

Thank You

[batua]

I Think Is Not Calzirtite Because :

1. Density / Specific Gravity Is Different.
Calzirtite Specific Gravity Around 5.
2. This Stone Is Very Opaque Not Transparent.

Thank You