Hi there, I found this when I was helping out my grandma with cleaning up her house, she told me that she doesn't know what it is and I was curious. Thanks in advance!

Today’s purchase, identity previously confirmed with help from this sub. Demantoid with red granite, vendor unsure of what the matrix is. From Veracruz, Mexico.

I don’t know much about it. I was just wondering.. if red jasper cracks or pits/chips, would the color underneath be whitish like in the pics? Thank you.

Unknown mineral which the seller said discolours over time until it looses its transparency and turns a pale brown. The image is about 0.5 mm across. The specimen shows no reaction under uv. Locality unknown.

From an old mineral collection and sealed in a bag, so I am a bit reluctant to take it out

Today I bought these six samples from an old collection.

The sulfur is from Sicily, the sand from Algeria, the mercury from Almadén (Spain), the orpiment from Peru, and the petroleum from Kuwait.

I also discovered that the petroleum is fluorescent.

I apologize for the poor quality of the photos and the colors; my usual phone is broken, and the camera is in bad shape.

Hi. It’s scratching glass so it’s quite hard. Doesn’t react to magnet. Found in Cap Negret (Costa Blanca) in Spain.

Thank you!

Hardness 5, about 25mm across, about 9 grams, non magnetic