Diamond is number 10 on the Mohs scale, and is 40 times harder than Corundum, which is number 9 on the Moh's scale. It also has the most dense atom ical configuration of any mineral, and is transparent over the greatest number of wavelengths.ISTINGUISHING SIMILAR MINERALS. The only mineral that can possibly be be confused with Diamond is waterworn Quartz pebbles which may resemble waterworn Diamonds, but the hardness and luster of Diamond will easily differentiate the two.
.A disconformity is an unconformity between parallel layers of sedimentary rocks which represents a period of erosion or non-deposition.
Click the image to see the animation. Use the movie controls to examine the stages. An unconformity is a gap in the sedimentary rock record. This animation shows the formation of an angular unconformityone where the layers above and below the unconformity are not parallel to each other, but form an angle. Examine how the final result allows you to infer the sequence of the rocks' formation.