radiant vs. round

[stary-eyed04]

Will a 2 carat radiant diamond look smaller than a 2 carat round diamond?

 

[Lorelei]

Here is a chart which will give you a rough idea, http://images.amazon.com/media/i3d/01/actual-diamond-size.pdf but many factors can affect which looks largest such as the cut quality, whether a diamond is cut too deep, shallow, thick or thin girdle etc. You need to check out each as an individual with their diameter measurements in particular and remember that both shapes are very different to each other. Lastly, Radiants can''t really be judged by the numbers, it is best to see what your eyes tell you, but with buying online see what your vendors can offer with pictures and cut quality images etc.

 

[JohnQuixote]

Many will, but it depends on how they were cut.

Use the first two mm measurements (l x w) to determine face-up spread.A standard 2ct RB will have an average girdle diameter close to 8.15 mm.A square radiant with a depth near 70% will be closer to 7.15 mm, but it depends on cut. Starset orientation can make a square appear larger but non-round shapes don’t have the edge-to-edge light return that the best rounds do, particularly at the corners. There is discussion in this thread that might be helpful.

 

[diagem]

Date: 5/29/2007 10:05:02 AM
Author: JohnQuixote

Many will, but it depends on how they were cut.

Use the first two mm measurements (l x w) to determine face-up spread.A standard 2ct RB will have an average girdle diameter close to 8.15 mm.A square radiant with a depth near 70% will be closer to 7.15 mm, but it depends on cut. Starset orientation can make a square appear larger but non-round shapes don’t have the edge-to-edge light return that the best rounds do, particularly at the corners. There is discussion in this thread that might be helpful.

A squarish Radiant having a 8.15mm LxW (average) diameter with a 50% total depth should weigh two carats.

It does not mean it will look great...

 

[JohnQuixote]

Date: 5/29/2007 10:19:27 AM
Author: DiaGem

Date: 5/29/2007 10:05:02 AM
Author: JohnQuixote



Many will, but it depends on how they were cut.

Use the first two mm measurements (l x w) to determine face-up spread.A standard 2ct RB will have an average girdle diameter close to 8.15 mm.A square radiant with a depth near 70% will be closer to 7.15 mm, but it depends on cut. Starset orientation can make a square appear larger but non-round shapes don’t have the edge-to-edge light return that the best rounds do, particularly at the corners. There is discussion in this thread that might be helpful.

A squarish Radiant having a 8.15mm LxW (average) diameter with a 50% total depth should weigh two carats.

It does not mean it will look great...

Just so. Refer to my yeller, feller.

 

[diagem]

Date: 5/29/2007 10:47:31 AM
Author: JohnQuixote

Date: 5/29/2007 10:19:27 AM
Author: DiaGem

Date: 5/29/2007 10:05:02 AM
Author: JohnQuixote




Many will, but it depends on how they were cut.

Use the first two mm measurements (l x w) to determine face-up spread.A standard 2ct RB will have an average girdle diameter close to 8.15 mm.A square radiant with a depth near 70% will be closer to 7.15 mm, but it depends on cut. Starset orientation can make a square appear larger but non-round shapes don’t have the edge-to-edge light return that the best rounds do, particularly at the corners. There is discussion in this thread that might be helpful.

A squarish Radiant having a 8.15mm LxW (average) diameter with a 50% total depth should weigh two carats.

It does not mean it will look great...

Just so. Refer to my yeller, feller.

But off course!!!
What do you think John..., can a 50% Total Depth Radiant still be considered a beautifull cut Diamond?

 

[JohnQuixote]

Date: 5/29/2007 10:52:59 AM
Author: DiaGem

But off course!!!
What do you think John..., can a 50% Total Depth Radiant still be considered a beautifull cut Diamond?

Sure.At 50% a radiant can return light and have reflection but there’s going to be leakage.It may be helpful for showing body color if that’s a goal. It depends on total configuration and what the cutter was trying to accomplish... Trilliants are fashioned from macles but can still have great reflection, beauty and distinctiveness. Beauty is in the eye of the beholder.

 

[RADIANTMAN]

A 2 ct round measuring 8.15 mm is geometrically the same size as a 7.2 mm princess or a 7.4 mm radiant. A square radiant measuring 8.15 mm would look as big as a 9.2 mm round. This is because the area of a circle is measured differently than the area of a square.

I''m sure John didn''t mean to suggest that a square radiant would have to measure 8.15 mm to look as big as a 2 ct round, but it kind of read like that.

 

[diagem]

Date: 5/29/2007 12:10:22 PM
Author: JohnQuixote

Date: 5/29/2007 10:52:59 AM
Author: DiaGem

But off course!!!
What do you think John..., can a 50% Total Depth Radiant still be considered a beautifull cut Diamond?

Sure.At 50% a radiant can return light and have reflection but there’s going to be leakage.It may be helpful for showing body color if that’s a goal. It depends on total configuration and what the cutter was trying to accomplish... Trilliants are fashioned from macles but can still have great reflection, beauty and distinctiveness. Beauty is in the eye of the beholder.

Agreed..., I have seen some drop dead gorgeous squares at around 50% TD..., and below!!!

They are extremely trough to locate these days.

 

[JohnQuixote]

Date: 5/29/2007 4:51:42 PM
Author: Radiantman
A 2 ct round measuring 8.15 mm is geometrically the same size as a 7.2 mm princess or a 7.4 mm radiant. A square radiant measuring 8.15 mm would look as big as a 9.2 mm round. This is because the area of a circle is measured differently than the area of a square.

I''m sure John didn''t mean to suggest that a square radiant would have to measure 8.15 mm to look as big as a 2 ct round, but it kind of read like that.

It did read like that, inadvertently.I appreciate Stan keeping me on the straight and narrow.Here are wire frame simulations of the examples he provided.Thanks Stan.

 

[JohnQuixote]

Date: 5/29/2007 4:57:48 PM
Author: DiaGem

Date: 5/29/2007 12:10:22 PM
Author: JohnQuixote

Sure.At 50% a radiant can return light and have reflection but there’s going to be leakage.It may be helpful for showing body color if that’s a goal. It depends on total configuration and what the cutter was trying to accomplish... Trilliants are fashioned from macles but can still have great reflection, beauty and distinctiveness. Beauty is in the eye of the beholder.

Agreed..., I have seen some drop dead gorgeous squares at around 50% TD..., and below!!!

They are extremely trough to locate these days.

DG - If you have an opinion...to what do you attribute that?