Naked Science Forum

Non Life Sciences => Geology, Palaeontology & Archaeology => Topic started by: Braduz on 18/06/2017 09:31:35

Title: Marble?
Post by: Braduz on 18/06/2017 09:31:35

Thank you for your help

Title: Re: Could someone identify what this rock is?
Post by: Kryptid on 19/06/2017 23:50:22

Do some tests on it. Measure its hardness by trying to scratch it with common materials like glass and steel. See if it has a streak when rubbed on paper. You can measure its density by first finding its weight and then dividing that by its volume (you can submerge it in a water-filled beaker and note the resulting increase in volume to determine this. Be sure there are no bubbles stuck to the rock).  See if it fluoresces under a black light. Reactions (or lack thereof) to acids and bases might help too.

Title: Re: Could someone identify what this rock is?
Post by: impyre on 08/07/2017 06:47:45

Just a guess here, but I'm thinking probably mostly quartz. It looks as if it has spent some time in a river. Milky quartz can take on a glassy appearance when wet.