what kind of rock is this?

Up
what kind of rock is this?

titlewhat kind of rock is this?
capture deviceCanon PowerShot G2
aperture2
date captured2002:02:13 19:45:10
exposure bias0
exposure index100
flash firedoff
fnum2
subject distance0.375 m
focal length_mm7 mm
height1704
max aperture2
meteringmulti-segment evaluative
exposure1/50 sec
shutter speed1/50 sec
width2272
image qualitySuper fine
macro modemacro
shooting modeSingle frame shooting
autofocus modesingle
contrastNormal
saturationNormal
sharpnessNormal
exposure modeAv
white balanceAuto
af points_used3 - centre
flash ec0
firmware versionFirmware Version 1.01
capture device_ownerPeter Jensen www.diff.net
filenameimg_3026.jpg