🔎 UNIDENTIFIED Please help identify

mcdowellrobin · Jul 19, 2025

Any help with identifying would be appreciated. Here’s what I know about it:
I found it in Knights Ferry, Ca.
It was as found about 7 yrs ago
Weight: 205 g
Density: 3.47
Only slight attraction with magnet
Left faint grey streak test.
**** unfortunately a friend soaked this in hot bleach water and dish soap for 3 days along with all my rocks thinking they would get mold if not

Hope this information can help identify

Terry Soloman · Jul 20, 2025

It's a rock, commonly known as "Leaverite."

ToddsPoint · Jul 21, 2025

It looks like diorite to me. Igneous, intrusive. Plagioclase feldspar, biotite, horn blend and pyroxine. Around 2 billion yrs old. Formed mainly in tectonic plate subduction zones.

I’ve carved it before and it takes on a nice polish.👍🏻

mcdowellrobin · Jul 21, 2025

ToddsPoint said:
It looks like diorite to me. Igneous, intrusive. Plagioclase feldspar, biotite, horn blend and pyroxine. Around 2 billion yrs old. Formed mainly in tectonic plate subduction zones. View attachment 2217727
I’ve carved it before and it takes on a nice polish.👍🏻View attachment 2217728

Ty very much.

ToddsPoint said:
It looks like diorite to me. Igneous, intrusive. Plagioclase feldspar, biotite, horn blend and pyroxine. Around 2 billion yrs old. Formed mainly in tectonic plate subduction zones. View attachment 2217727
I’ve carved it before and it takes on a nice polish.👍🏻View attachment 2217728

ty for such a great explanation. But how would it have gone to surface in knight ferry California. Now I need to know how something this cool came to my life

Red-Coat · Jul 21, 2025

mcdowellrobin said:
Ty very much.

ty for such a great explanation. But how would it have gone to surface in knight ferry California. Now I need to know how something this cool came to my life

AI gives you the answer... or at least a possible answer:

"Yes, diorite is found near Knights Ferry, California. Specifically, it's associated with the Halleck Hill intrusive rocks, which are described as fine- to medium-grained diorite, leucocratic porphyry, and pegmatites. These rocks are located in the western-central part of the Columbia 7.5' quadrangle, which includes the area around Knights Ferry. The diorite is often found in an arcuate band near Halleck Hill, with inclusions of dark gray hornfels and xenoliths of more mafic rock types."