Discussions

╳Discussions

Groups

Recent Images in Discussions

Identity HelpFound in Italy, I need your help in its identification

20th Mar 2022 16:27 UTCFilippo ER

I have found these specimens inside a sandstone conglomerate in:

Monte Cavalloro, Riola, Vergato, Metropolitan City of Bologna, Emilia-Romagna, Italy

(valid minerals: Albite - var. Oligoclase – Chalcopyrite – Chamosite – Hematite – Hydroxylapatite – Ilmenite – Magnetite – Pyrite - 'Pyroxene Group' – Stilpnomelane)

The habitus and the colour of these crystals (colorless - white - light color) makes me assume that they are Albite or Oligoclase.

I have done only this visual exham and the tests required for post insertion: it scratches glass ; unscratchable with fingernail ; it seems heavy for the size.

Thank you.

Questions Answered
Can it scratch glass? : Yes
Can you scratch it with your fingernail? : No
Is it light/heavy for the size? : Heavy

18th Aug 2022 07:06 UTCLuca Baralis Expert

Can it scratch glass? : Yes

...Looking at the picture, and if it scratch easily, I'd go for massive quartz.

I don't see any cleavage mark for albite

18th Aug 2022 11:55 UTCHarold Moritz 🌟 Expert

If it came out of a conglomerate, it is most likely quartz, which it looks like.

19th Aug 2022 17:41 UTCGregg Little 🌟

In sandstone conglomerates (quartz arenites) the clasts are almost always detrital quartz grains. If the rock is poorly consolidated, weathered or the matrix is quite friable then the quartz pebbles can easily separate out.