Why are there less rounds in colors than in diamonds?

[beaujolais]

Just wondering why it seems like round in colored stones is a much less common shape than it is in diamonds?

Thanks.

 

[belle]

the round doesn't concentrate colors like other shapes do. that is why round is so popular in colorless diamonds (and not so in colored).
rough is planned and cut to maximize the attributes of that type of stone.
for example, if you had two pieces of the same rough and you cut one round and one square, you could get two different intensities of color.

 

[Harriet]

For some species, it has to do with the crystal form.

 

[chrono]

Nothing more to add other than in coloured gemstones, many roughs are not suited for rounds. To get the most carat weight out of the raw material, ovals are the most common shape.

 

[onvacation]

Ovals also concentrate the color, and you can find a lot of colored stones cut with a lopsided, chubby pavilion so that the color will appear darker.

 

[Missrocks]

.

 

[marcy]

Ditto to what everyone else said and I also notice in less saturated stones (like tanzanite or aquas) they really don''t look as great in rounds as ovals.