This is a part of a tree knot of a live oak tree. The wood is very hard and heavy for its size. The age is unknown but was located in south Texas in the San Antonio area. It does is Live Oak tree from this area as the wood from that species is very hard and heavy even dried,. The measurements are approximate not exact 6.25x6.0x5.0 inches. The weight is 2.38 lb. This is a very unique hard to find piece.