# Adding more meteorites to my collection

• I
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my heart attack
Is that what you described in the solar photography post as "a major health hassle"? Glad you're still in one piece.

DennisN, Dragrath, berkeman and 2 others
Gold Member
Is that what you described in the solar photography post as "a major health hassle"? Glad you're still in one piece.

yes, it is ....thanks mate, it was a close call. After a week at home, am feeling much better

DennisN, Dragrath, berkeman and 2 others
I would appreciate it if the thread has some good discussion rather than just a show and tell
I'm currently considering purchasing a 'thin section' to try imaging through crossed polarizers- most of the samples on eBay seem to be chondrite (for example, this one). Not sure what I am looking for, to be honest- the chondrules appear to give nice colorful images, but....

The site you mentioned earlier www.meteorites-for-sale.com was very useful to parse some of the identifying lingo, but I'm no geologist..... "H5"? "CR2"? Thin section slides aren't cheap, exactly. A polished slab of an iron meteorite would also (likely) give great results in reflected light, but no nice colorful view through crossed polars.

Thoughts?

Staff Emeritus
but I'm no geologist.....
Hmmm...is there even a word? Geologist seems not quite right, since these rocks aren't from "geo". Meteorologist is clearly wrong. Petrologist?

Gold Member
Hmmm...is there even a word? Geologist seems not quite right, since these rocks aren't from "geo". Meteorologist is clearly wrong. Petrologist?
Meteoriticist…

Apparently

@davenn is a meteoriticst? If not then he is definitely a meteorphile!

davenn and DennisN
Gold Member
I'm currently considering purchasing a 'thin section' to try imaging through crossed polarizers- most of the samples on eBay seem to be chondrite (for example, this one). Not sure what I am looking for, to be honest- the chondrules appear to give nice colorful images, but....

Hi Andy, sorry for the delay, just home from 2 weeks on your side of the planet. 3 nites in London, 2 nites in Paris and 7 nites in Iceland

A beautiful chondrite not one I have in my collection ... US$89 isnt too bad for the work required to produce a thin section I see it is still available I used to do thin sections when I was doing my geology degree at uni. it's a lot of messy fun That sample is a LL3.... LL = Low iron, low metal and the 3 indicates the amount of metamorphism of the chondrules The 3 main groups are .... LL = Low iron, low metal L = Low iron H = High iron Then the different grades of metamorphism 0 to 5 and of weathering = W0 to W5 but I'm no geologist..... "H5"? "CR2"? H = high iron as above C is for the carbonaceous chondrites and there is quite a range of them ..... The C = Carbonaceous and the following letter denotes the location of the first identified sample of that group ( what we call a type name) CI = Ivuna CM = Murchison (Victoria state, Australia) CO = Ornans CR = Renazzo CH = (ALH) = Allen Hills, Antarctica CB = Bencubbin = Western Australia state, Australia CV = Vigarano CK = Karoonda = South Australia state, Australia for your fun, I will let you look up the locations of the others A polished slab of an iron meteorite would also (likely) give great results in reflected light, but no nice colorful view through crossed polars. Yes, polished AND etched brings out the Widmanstätten pattern ( also called the Thompson Structure) of the iron and nickel crystals from my collection ... Seymchan, Russia cheers Dave berkeman and pinball1970 Science Advisor Gold Member is a meteoriticist ? yup, that's the one and a lay geologist and astronomer and ..... hahaha I love the geology of Iceland so amazing with all the new and old volcanics ohhh and the spectacular aurora Will do a holiday thread in general discussion section Petrologist? petrology covers the composition etc of both earth rocks and meteorites Vanadium 50 and pinball1970 Science Advisor Education Advisor Hi Andy, sorry for the delay, just home from 2 weeks on your side of the planet. 3 nites in London, 2 nites in Paris and 7 nites in Iceland A beautiful chondrite not one I have in my collection ... US$89 isnt too bad for the work required to produce a thin section
I see it is still available

I used to do thin sections when I was doing my geology degree at uni. it's a lot of messy fun

That sample is a LL3....
LL = Low iron, low metal and the 3 indicates the amount of metamorphism of the chondrules

The 3 main groups are ....
LL = Low iron, low metal
L = Low iron
H = High iron

Then the different grades of metamorphism 0 to 5 and of weathering = W0 to W5

H = high iron as above
C is for the carbonaceous chondrites and there is quite a range of them .....
The C = Carbonaceous and the following letter denotes the location of the first identified sample of that group ( what we call a type name)
CI = Ivuna
CM = Murchison (Victoria state, Australia)
CO = Ornans
CR = Renazzo
CH = (ALH) = Allen Hills, Antarctica
CB = Bencubbin = Western Australia state, Australia
CV = Vigarano
CK = Karoonda = South Australia state, Australia

for your fun, I will let you look up the locations of the others

Yes, polished AND etched brings out the Widmanstätten pattern ( also called the Thompson Structure) of the iron and nickel crystals

View attachment 323816
from my collection ... Seymchan, Russia

cheers
Dave
This is extremely helpful and informative- many thanks!!!!

davenn