The answer depends on the state of the diamond.
Once cut and polished -- a gemstone: only 20% of raw stones mined -- a diamond's best natural qualities are highlighted.
A bag full of industrial diamonds -- the remaining 80% of mined diamonds -- appear to be 'dirty rocks'.
Yes, some diamonds will give this appearance.
Yellow diamonds are a type of diamond. These are diamonds that feature a yellow hue. These diamonds are also called fancy diamonds.
You can review the site, below, and see photos of diamonds found there.
Not familiar with "diamonds in the dust," but you may be thinking of "diamonds in the rough." This is a cliche that references the high potential seen in someone or a group of people that do not necessarily demonstrate it from their outward appearance.
Fake diamonds such as rhinestones, zircon, and cubic zirconia don't lose luster over time, but the problem is that they don't have near the luster of the real thing in the first place. So in one way, you could say they never had an attractive appearance to lose.
Not zirconium (the metal) but the zirconium dioxide - ZrO2 (crystallized in cubic form) is very similar as appearance to diamond.
Simulated diamonds are typically chosen instead of a real diamond because of the price and minute visual differences from a real diamond. Sometimes simulated diamonds can vary in appearance in stylistic ways that real diamonds cannot, such as differences in color and tone.
Diamonds Diamonds was created in 1982.
You may be thinking of a cut of diamond gemstone. Square cuts include Asscher, Cushion, and Princess. Emerald cut is more rectangular in its appearance.
'Regular diamonds' are diamonds described without colour. 'Chocolate diamonds' are brown diamonds that include a description of the colour.
Kiran diamonds are manufactured diamonds: real, manufactured diamonds.
Appearance wise, diamonds feel like they have an oily film on them which prevents them from being dirty. They also have a metallic luster like new steel or lead. They will not be clear like glass and are translucent. You can typically see into them but not through them.