1. Create an oval and smear with shades of red allowing a transparency around the edges. You could do this with a semi-transparent crimson red like alizarin.

The rest is pure fiction and applied logic ...

a) Light source (top left) determines the position of the shadow as well as the position of the reflected light on the stone.

b) The highlight on the stone tell us the much. As it is sharply focused we know the stone is smooth and shiny (very reflective). Here it is a window - reflected twice (the second time gives the stone greater transparency). By its position we also know the window is the main light source for the object and a line drawn from the observer to the highlight would reflect at an angle and pass out the window. This tells us that the object's surface is at an angle (round) and that the window is high left. This information should tally with the position of the shadow.

c) The horizontal bands on the ring band define its texture and roundness. The elliptical shadow reinforces this assumption.

Here again this object is not drawn from anything real. It is a pure construction using logic and remembered observation.

STUDENT ACTIVITY: Find examples of gold, silver, chrome and copper and describe them in terms of reflectiveness, edge and color (light hue and dark hue).

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