Some of you may know how long I have been searching for Jade sharpening stones. Each time I finally have found one, I have to sell it. well, I got do it again but, this time I have a friend who periodically cuts new ones when he finds a clean enough piece. These are made of California jadeite and a dark green blue with white streaks. They are harder than steel and will last hundreds of lifetimes before you ever wear it out. They are around 10k to 12k grit and give a very high polished edge. These are from Jade Cove near Big Sur. since I don't have a strop I use a few passes on these and I'm good to go.
First one is
L 5 1/2 in x W 2 3/8 in x h 1 1/8 in
$150 conus shipping