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.
There are three main types of unconformities: 1. Disconformity-The erosional surface separates rock beds which are parallel, but there is a significant lapse of time between the two sets of beds. 2. Angular unconformity-The erosional surface separates rock beds which are at an angle to each other.se the fundamental concepts (p. 12), the terms used to describe geologic events (below and correctly identify any unconformities using diagrams on the next page. Use the block diagram below as a tool for success. Notice that the rock layers are numbered from oldest (1) to youngest (3) and geologic events are lettered.