I found this in the ground at a job site in blue springs mo . Its purple with darker purple lines through it like growth marks on a tree. It is about the size of a large loaf of bread 7 inches across 4 inches thick and 6 inches long . It is very heavy for a rock its size i would say it may weigh 20lbs or 25lbs. I can scratch it with a pair of sizzors And it leaves marks easy a penny just scuffs surface ill show pictures of it dry and wet . Wanting to know what it is. Thank you.! The powder after scratching it us purple as well . Looks like there may be crystal on it. Quartz maybe. enter image description here
closed as off-topic by Jan Doggen, Leukocyte, Fred, Erik, gansub Aug 29 at 10:30
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Jan Doggen, Leukocyte, Fred, Erik, gansub
Your rock looks like one of the following:
- Limestone: White specks might be fossil fragments. Use HCL to determine if the rock reacts or white specks react to the acid. In Ohio, I have found pieces of limestone nearly the same color.
- Dolostone: Similar to limestone but will be weakly to not reactive to a simple HCL test.
- Banded Quartzite: Metamorphosed quartz rich sedimentary rock. Most quartz is very hard and tough. Use a hammer and chisel and see if you can break the rock along a 'bedding' line. If the rock breaks easily, it was not quartzite. Wisconsin, Minnesota and South Dakota have occurrences of dark red quartzite that look similar.
- Banded Jasper or chalcedony. The texture of your rock really does match typical jasper or chalcedony.
- Hard metamorphosed sedimentary sandy shale to greywacke. I have seen similar rocks around the Bay of Fundy in New Brunswich and Nova Scotia Canada. That color of rock can be found throughout Canadian Maritime provinces.