Anyone know what type of rock is this?

[mummzjoko]

Hello, my dad has dig with excavator this stone 10 years ago in Italy, it was for a long time in house and i decide to find answer what really this stone is, i was searching like 10 hours but cant find anything similar? anyone have an idea what this is ?

 

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[RustyGold]

Welcome to TreasureNet. I wish I could help. There will be someone who can identify this stone. Good luck!

 

[RustyGold]

I’m probably wrong but possibly this.
Another accessory mineral, cordierite is found in high-magnesium, high-grade metamorphic rocks like hornfels and gneiss. Cordierite forms grains that display a shifting blue-to-gray color as you turn it. This unusual feature is called dichroism. If that isn't enough to identify it, cordierite is commonly associated with mica minerals or chlorite, its alteration products. Cordierite has few industrial uses.

Glassy luster; hardness of 7 to 7.5.


Dumortierite


This uncommon boron silicate occurs as fibrous masses in pegmatites, in gneisses and schists, and as needles embedded in knots of quartz in metamorphic rocks. Its color ranges from light blue to violet. Dumortierite is sometimes used in the production of high-quality porcelain.

Glassy to pearly luster; hardness of 7.


Glaucophane
Graeme Churchard/Flickr/CC BY 2.0

This amphibole mineral most often is what makes blueschists blue, although bluish lawsonite and kyanite may also occur with it. It is widespread in metamorphosed basalts, usually in felted masses of tiny needle-like crystals. Its color ranges from pale gray-blue to indigo.

Pearly to silky luster; hardness of 6 to 6.5.

 

[Back-of-the-boat]

Wrong type of stone what he has would be classified as sedimentary not metamorphic Sediment means the laying down of layers basically.

 

[mummzjoko]

I can't find anything similar on google images :/

 

[DizzyDigger]

BoB..sedimentary makes sense, but then again I'm not a geologist.

Mumm..I looked at a number of online images, and have to
wonder if it's not a type of Chalcedony. Again, my knowledge
is very limited.

 

[mummzjoko]

Hmm this is wierd litteraly listed 100 000 rock photos online could not find anything simillar