This first line was taken off another thread, but my response got me to thinking.
I hope an appraiser can explain why diameter is better than area.
~~~
Another thread said you need a %20 increase in diameter to be noticeable to the eye.
Do you mean 2mm?, or maybe 2%,
20% of a diameter change is very large.
a 1 carat at 6.5mm + 20% is
7.8 mm, which is a very large stone.
NO ONE SEEMS TO MENTION THIS, BUT DIAMETER IS VERY MISLEADING because it is one diminional. I think we should use AREA, not diameter.
In the above example the Diameter is 20% more, does that mean the diamond is 20% bigger? No. It''s 44% bigger. A = pi, r sq
Diamond One 6.5mm diameter. Diamond Two 7,8mm.
Diamond One -AREA
3.14 * 3.25 sq = 33.16
Diamond Two-AREA
3.14 * 3.9 sq =47.76
44% BIGGER, NOT 20%
I''m sure there''s some reason why AREA isn''t used, but it''s more clear to me.
I hope an appraiser can explain why diameter is better than area.
~~~
Another thread said you need a %20 increase in diameter to be noticeable to the eye.
Do you mean 2mm?, or maybe 2%,
20% of a diameter change is very large.
a 1 carat at 6.5mm + 20% is
7.8 mm, which is a very large stone.
NO ONE SEEMS TO MENTION THIS, BUT DIAMETER IS VERY MISLEADING because it is one diminional. I think we should use AREA, not diameter.
In the above example the Diameter is 20% more, does that mean the diamond is 20% bigger? No. It''s 44% bigger. A = pi, r sq
Diamond One 6.5mm diameter. Diamond Two 7,8mm.
Diamond One -AREA
3.14 * 3.25 sq = 33.16
Diamond Two-AREA
3.14 * 3.9 sq =47.76
44% BIGGER, NOT 20%
I''m sure there''s some reason why AREA isn''t used, but it''s more clear to me.