shape
carat
color
clarity

# Quiz ...

#### Gypsy

##### Super_Ideal_Rock
So I was talking to another PSer a while back and I said something about the spread of a diamond and she was like... and your point is? I just assumed that every Pser knows what the face up sizes of the different shapes are at 1 carat or so. Turns out I was wrong so...

Here's a quiz: (we'll do the answers on Friday).

What is the approximate face up of the following shapes at 1 carat (ranges for fancy's):

1. Well cut one carat round brilliant?

2. Well cut one carat square princess?

3. Well cut one carat square cushion?

4. Well cut one carat rectangular cushion?

5. Well cut one carat rectangular emerald cut?

6. Well cut one carat square emerald cut?

#### diamondseeker2006

##### Super_Ideal_Rock
Ha! I surely can't answer those without looking them up! I know they are all less than the round, which should be about 6.5mm. I know different weight round diameters pretty well because that is mainly what I look at. I have been looking at the AVC's lately and the square ones cts. run close to 6mm.

#### jstarfireb

##### Ideal_Rock
All I know is that a round should be about 6.5mm and a princess about 5.5mm, give or take a tad.

#### shimmer

##### Brilliant_Rock
Gypsy|1319068371|3043824 said:
So I was talking to another PSer a while back and I said something about the spread of a diamond and she was like... and your point is? I just assumed that every Pser knows what the face up sizes of the different shapes are at 1 carat or so. Turns out I was wrong so...

Here's a quiz: (we'll do the answers on Friday).

What is the approximate face up of the following shapes at 1 carat (ranges for fancy's):

1. Well cut one carat round brilliant? 6.5mm

2. Well cut one carat square princess? 5.7mm

3. Well cut one carat square cushion? 6mm

4. Well cut one carat rectangular cushion? 6.2 x 5.5

5. Well cut one carat rectangular emerald cut? 7 x 5

6. Well cut one carat square emerald cut? 5.5mm

#### manderz

##### Brilliant_Rock
Interesting. I know that a rb should be around 6.5mm, but beyond knowing that others face up a bit smaller, I'm at a loss.

#### zoebartlett

##### Super_Ideal_Rock
manderz|1319077720|3043939 said:
Interesting. I know that a rb should be around 6.5mm, but beyond knowing that others face up a bit smaller, I'm at a loss.

Yeah, I don't know the others either.

#### yennyfire

##### Ideal_Rock
Zoe|1319103132|3044049 said:
manderz|1319077720|3043939 said:
Interesting. I know that a rb should be around 6.5mm, but beyond knowing that others face up a bit smaller, I'm at a loss.

Yeah, I don't know the others either.

Thritto.

#### Gypsy

##### Super_Ideal_Rock
yennyfire|1319112672|3044081 said:
Zoe|1319103132|3044049 said:
manderz|1319077720|3043939 said:
Interesting. I know that a rb should be around 6.5mm, but beyond knowing that others face up a bit smaller, I'm at a loss.

Yeah, I don't know the others either.

Thritto.

Such interesting results so far!

#### Skippy123

##### Super_Ideal_Rock
diamondseeker2006|1319071445|3043854 said:
Ha! I surely can't answer those without looking them up! I know they are all less than the round, which should be about 6.5mm. I know different weight round diameters pretty well because that is mainly what I look at. I have been looking at the AVC's lately and the square ones cts. run close to 6mm.
this.

I only know that a RB looks bigger than a princess due to cut size and that people complain about the face up of asschers. I love me an asscher or octavia though!!! Oh and Pears and Marquise look bigger since they are elongated.

#### amc80

##### Ideal_Rock
All I know is a RB should be 6.5 and a 2ct RB should be around 8.

#### kelpie

##### Ideal_Rock
I think surface area is a more accurate consideration corresponding to the visual impression of diamond size. The corners of a square stone add surface area but not spread. Still trying to figure out how to calculate surface area for a pear....

#### rubybeth

##### Ideal_Rock
Skippy|1319141858|3044381 said:
diamondseeker2006|1319071445|3043854 said:
Ha! I surely can't answer those without looking them up! I know they are all less than the round, which should be about 6.5mm. I know different weight round diameters pretty well because that is mainly what I look at. I have been looking at the AVC's lately and the square ones cts. run close to 6mm.
this.

I only know that a RB looks bigger than a princess due to cut size and that people complain about the face up of asschers. I love me an asscher or octavia though!!! Oh and Pears and Marquise look bigger since they are elongated.

I thought pears and marquise cuts look bigger because they are shallower than other cuts?

#### amc80

##### Ideal_Rock
kelpie|1319150790|3044470 said:
I think surface area is a more accurate consideration corresponding to the visual impression of diamond size. The corners of a square stone add surface area but not spread. Still trying to figure out how to calculate surface area for a pear....

It's been a while since I've taken math, but wouldn't it be the area of a triangle plus the area of a semi-circle?

#### violet3

##### Ideal_Rock
i have no idea, but i can't wait to see the results! I only know that asschers face up small and RBs face up large (i think?)

#### daintyG

##### Brilliant_Rock
I'm not a well-seasoned PSer, so I just know the dimensions for the shapes that I'm particularly interested in.

You forgot to list MQ cuts for your quiz. I don't remember the width, but the length should be about 10 mm. That's one thing to love about MQ cuts, even though they aren't popular anymore.

#### decodelighted

##### Super_Ideal_Rock
daintyG|1319172078|3044662 said:
I'm not a well-seasoned PSer, so I just know the dimensions for the shapes that I'm particularly interested in.

You forgot to list MQ cuts for your quiz. I don't remember the width, but the length should be about 10 mm. That's one thing to love about MQ cuts, even though they aren't popular anymore.
It could change. I noticed Christina Applegate's character is wearing a marquise cut engagement set on the new show "Up All Night".

#### Amys Bling

##### Super_Ideal_Rock
jstarfireb|1319071599|3043858 said:
All I know is that a round should be about 6.5mm and a princess about 5.5mm, give or take a tad.
That's the extent of my knowledge!

#### Gypsy

##### Super_Ideal_Rock
shimmer|1319076345|3043918 said:
Gypsy|1319068371|3043824 said:
So I was talking to another PSer a while back and I said something about the spread of a diamond and she was like... and your point is? I just assumed that every Pser knows what the face up sizes of the different shapes are at 1 carat or so. Turns out I was wrong so...

Here's a quiz: (we'll do the answers on Friday).

What is the approximate face up of the following shapes at 1 carat (ranges for fancy's):

1. Well cut one carat round brilliant? 6.5mm

2. Well cut one carat square princess? 5.7mm

3. Well cut one carat square cushion? 6mm

4. Well cut one carat rectangular cushion? 6.2 x 5.5

5. Well cut one carat rectangular emerald cut? 7 x 5

6. Well cut one carat square emerald cut? 5.5mm

Shimmer got all the answers. Shimmer, if you spent more time on RT you would be a great help!

I would only add that both the rectangular cushion and the square emerald cut dimensions are 'minimums' you can get bigger, but you shouldn't get smaller.

With the other dimensions you can get slightly less and it would still be well cut.

#### Clairitek

##### Ideal_Rock
Gypsy|1319068371|3043824 said:
So I was talking to another PSer a while back and I said something about the spread of a diamond and she was like... and your point is? I just assumed that every Pser knows what the face up sizes of the different shapes are at 1 carat or so. Turns out I was wrong so...

Here's a quiz: (we'll do the answers on Friday).

What is the approximate face up of the following shapes at 1 carat (ranges for fancy's):

1. Well cut one carat round brilliant?

2. Well cut one carat square princess?

3. Well cut one carat square cushion?

4. Well cut one carat rectangular cushion?

5. Well cut one carat rectangular emerald cut?

6. Well cut one carat square emerald cut?

1. About 6.5 mm in diameter
2. About 5.8 mm x 5.8 mm
3. A smidge less than 6x6mm
4. & 5. are tough for me since I am not sure what an ideal aspect ratio would be.
6. 6x6

#### Gypsy

##### Super_Ideal_Rock
diamondseeker2006|1319419113|3046231 said:
Shimmer, did you really have all those memorized? I am impressed if you did! I don't have them memorized because I usually only help with round threads, or with cushions, I ask to see the pictures!

Plus, I use this if I really need to know!

http://www.gemnation.com/images/actual-diamond-size-comparison.pdf
DS I have them memorized and that's how I knew her answers were right and I never checked a source. Spread is always interesting to me, so I memorized it.

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