So, a square stone which measure 7.7 from point to point will look bigger than anything which measures less than 7.7 in diameter, for instance a 6.5 mm round stone of 1Ct?

So, a square stone which measure 7.7 from point to point will look bigger than anything which measures less than 7.7 in diameter, for instance a 6.5 mm round stone of 1Ct?

Diagem... only if the diamond was mounted or viewd <> like a kite. A princess diamond viewed as a square as with an diagonal measurement of 7.7 will probably look smaller than a 6.5 round. I know that my asscher is about 6x 6 when viewed square... and when measured on the diagonal it is larger than 6 x 6 and mine doesn''t have corners like a princess. It looks much larger when compared to a round if it''s viewed as a kite.

So, a square stone which measure 7.7 from point to point will look bigger than anything which measures less than 7.7 in diameter, for instance a 6.5 mm round stone of 1Ct?

Ok, now I thnk I see where you are. You mean the hypotenus of the right triangle formed by the corners of a square princess cut. Been a long time since high school math for me!

Anyhow, to get a 7.7 hypotenus ( diagonal center line measurement) you need side measurements of about 5.5mm. Yes, that would look smaller, I think, than a 6.5mm round.

Paul, what belle said was meant for the rounded shapes i believe which was the case of op question and she tried to make it simple within the matter.
Your princess will look larger than a trillion with smaller sides than "point-to point" it does not make belle wrong in this particular case.

So, a square stone which measure 7.7 from point to point will look bigger than anything which measures less than 7.7 in diameter, for instance a 6.5 mm round stone of 1Ct?

Ok, now I thnk I see where you are. You mean the hypotenus of the right triangle formed by the corners of a square princess cut. Been a long time since high school math for me!

Anyhow, to get a 7.7 hypotenus ( diagonal center line measurement) you need side measurements of about 5.5mm. Yes, that would look smaller, I think, than a 6.5mm round.

I think Paul was having fun with geometry. A 7.70 mm square, tip to tip, appears smaller that a 6.50 round because it is, in fact, a smaller stone in terms of what you see on the grading report (5.50 mm is right Beacon

some time ago i made a pic for an asscher IRL- hand shot for one poster and never used it, so here you go. I believe the bigger asscher would give bigger visual difference.

I believe original question was more about visual perception than actual measurements. Brain has it''s own ways interpreting optical information, let me dig out that picture with the rails.

So, a square stone which measure 7.7 from point to point will look bigger than anything which measures less than 7.7 in diameter, for instance a 6.5 mm round stone of 1Ct?

Ok, now I thnk I see where you are. You mean the hypotenus of the right triangle formed by the corners of a square princess cut. Been a long time since high school math for me!

Anyhow, to get a 7.7 hypotenus ( diagonal center line measurement) you need side measurements of about 5.5mm. Yes, that would look smaller, I think, than a 6.5mm round.

I think Paul was having fun with geometry. A 7.70 mm square, tip to tip, appears smaller that a 6.50 round because it is, in fact, a smaller stone in terms of what you see on the grading report (5.50 mm is right Beacon

Very nicely improved Wikipedia article, use all the links offered - there are great pictures and so much more illusions explained since i was there last time. Great job!

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