Tenho essas amostras mas não sei por onde começar o polimento (não terminei todas), são minhas primeiras e queria saber se alguém tem uma dica que possa me dar uma direção.

Tenho lixas d'água até 3.000, abrasivo e feltro.

I recently acquired this mineral specimen from Lavrion (Lavrio), Attica, Greece. It weighs 219.73 g.

The specimen features numerous solid, rounded to botryoidal formations on a brown, oxidized matrix.

The formations display pale green, blue-green and whitish coloration, with some areas showing more intense green and blue patches.

Under a USB digital microscope, certain areas appear translucent, with a glassy to waxy appearance.

I gently cleaned a few areas with a little water to remove surface dust. The formations became more translucent when wet and slightly duller again after drying.

The rounded formations feel solid rather than soft or powdery.

I haven't been able to identify the mineral with certainty.

Any help with identification would be greatly appreciated!

Can anyone please help me identify and point me in the right direction to have this appraised? Any info is greatly appreciated .

This mineral specimen from Xanthi, northeastern Greece, features an interesting combination of quartz and epidote.

The specimen features white to translucent quartz crystals growing within small cavities and across a green to yellowish-green epidote matrix.

The quartz displays elongated prismatic crystals and smaller crystal clusters, creating a distinct contrast with the surrounding epidote.

Locality: Xanthi, Greece

Weight: 141.95 g

Just curious about this ring! It is sterling silver.

I recently acquired this specimen from Lavrion (Lavrio), Attica, Greece. It weighs 285.49 g.

The yellow mineral forms a very fine yellow to yellow-green coating on a strongly oxidized brown matrix. Individual crystals are very difficult to distinguish with the naked eye.

Under a USB digital microscope, it appears to consist of extremely small needle-like or prismatic crystals, often forming radiating clusters or rosette-like formations.

I also tested it under 365 nm UV light, and the yellow mineral showed no obvious fluorescence.

There are also clear/white crystals present on another part of the specimen.

Does anyone recognize the yellow mineral or have any suggestions for a possible identification? Any help or opinions would be greatly appreciated.