DIAMONDS. GLORIOUS DIAMONDS! Many, many women want a diamond and only a diamond for an engagement ring. Some sources indicate 75-80% of American brides wear a diamond ring as their geological marriage symbol. Factors in this desire include tradition, durability, beauty, and high value. You can read in my last post that it isn't for everyone, but if you are shopping for that perfect diamond you need to be informed.
There are plenty of diamond buying guides out there. The Gemological Institute of America, or GIA, is a nonprofit committed to enhancing gemological knowledge and represents the gold standard of diamond grading.
You can check our their diamond buying guide here. They explain "the four Cs" (cut, color, clarity, carat) and give solid diamond buying tips you can trust. Some would consider "cost" a 5th "C".
A quick summary:
CUT
Many believe this the most important factor in the overall beauty and value of the stone. It refers to how well cut the stone's shape is to maximize the sparkle and overall appearance of the stone. Asymmetry or improper depth can affect the rating and how well the gem reflects light. This illustration demonstrates it pretty well:
The GIA rates cut along this scale: Excellent, Very Good, Good, Fair, and Poor. Another popular grader, AGS, uses the same terminology but adds an "Ideal" category above "Excellent."
People may refer to the shape of the stone (round, square, etc.) as the "cut," but that's not related to the quality rating. Diamonds of all different shapes have ideal versions of their shape that best utilize the diamonds' natural qualities, and are graded on how closely the diamond's proportions are cut to that ideal.
COLOR
Rated D-Z, colorless to yellow. D is the more valuable side, buit people have different sensitivity to color. D-F are considered colorless while G-J are near colorless. For a diamond that's supposed to be white/clear you want to be in either of those ranges. Here's a couple examples of color guides:
CLARITY
Refers to imperfections in the stone:
CARAT
The weight. In general, the higher the carats the bigger the size and price.
COST?
While the most expensive diamond ever sold went for $83.2 million -
hello, gorgeous:
you can save your $83 mil for a mansion in the Maldives with robot butlers and snag a gem for a few thousand bucks instead.
A half-carat round diamond with a very good cut, VVS1-VVS2 clarity, color G-H can be found on popular sites for around $1,500 to $2,000.
Make that an ideal cut, FL-IF clarity, color D-E, and one full carat and the price goes up to around $15,000.
A few sources say the average cost of an engagement ring is around $5,000. This is not encouragement to strive to be average, but just for comparison's sake let's pull $4,000 of that for the diamond alone (sans setting) and see what you can get on one popular diamond buying site, Brilliance. Let's look just at round diamonds with GIA ratings for easy comparison.
I set the price range to $3,800-$4,100, then set some lower limits: No lower than a J color rating, Very Good cut, or VS2 clarity. (The cut ratings they display are Super Ideal, Ideal, Excellent, Very Good, and Good.)
Let's see what we can get...
Carat
|
Cut
|
Color
|
Clarity
|
1.01
|
Very Good
|
J
|
VS2
|
0.92
|
Very Good
|
G
|
VS1
|
0.84
|
Super Ideal
|
H
|
VS1
|
0.84
|
Excellent
|
G
|
VVS2
|
0.80
|
Super Ideal
|
H
|
VVS1
|
0.79
|
Very Good
|
F
|
VVS2
|
0.78
|
Super Ideal
|
H
|
IF
|
0.74
|
Super Ideal
|
G
|
VVS1
|
0.71
|
Super
Ideal
|
G
|
IF
|
0.71
|
Super
Ideal
|
E
|
VVS1
|
0.71
|
Ideal
|
D
|
VVS1
|
0.65
|
Super Ideal
|
D
|
VVS1
|
0.52
|
Super Ideal
|
D
|
IF
|
for advanced diamond buyers: fluorescence for each is none or faint
You can see of course as one goes up, another goes down. This is especially evident among stones of the same size; see the bolded 0.71 carat size section.
Check around, now that you're armed with diabolical diamond knowledge, and see what combination of factors works for you. Many sites have easy search formats for loose diamond shopping and you can experiment what you can get for your buck. A few examples are
Blue Nile,
James Allen,
Lumera Diamonds, and
Brilliance. Good luck!