What is it

[Bradley Morrison]

I got this rock from my grandma. It is super dark blue. Almost black. It has black white and bronze colored dots. When u move it, the white and blue twinkles. It is some type of polished stone. Any idea of what it is? The coin is there for size comparison.

 

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[Red-Coat]

It looks to me like blue 'goldstone', which is an artificial glass commonly sold in 'new age' rock & gem stores as tumble-polished pieces. Traditionally, it has been reddish brown with small glittery golden inclusions as a result of the use of copper salts and particulate copper to colour it. More recently it has been produced using cobalt instead of copper, which gives a strong blue colour and a more silvery appearance to the inclusions.

 

[flinthunter]

At first glance I thought it might be an Apache Tear polished stone but the colored inclusions really don't match AT's. I think Red-Coat has a better answer.

 

[Wildcat1750]

Interesting...