Diamond Calculator

When it’s time to choose the ideal diamond for you we offer the finest GIA certified stones in Boston. We have a vast array of shapes and sizes for every taste and budget. Whether you are familiar with diamond jewelry or just starting to research diamonds, our knowledgeable staff will guide you through the process. We specialize in ideal cut round diamonds and uniquely brilliant fancy shapes. We guarantee that your search for the perfect diamond ends at Alex & Company

The value of a diamond is largely determined by clarity, color, and carat, and the various grades within each of those categories. At Alex & Company, we understand that a diamond is an investment, and we take the time to educate and guide you through the decision-making process. Our Master Jeweler and GIA Graduate Gemologist has years of experience hand-selecting the highest quality diamonds in each category, which enables us to share helpful insights and advanced knowledge with you so that you can maximize your budget and enjoy the ultimate value in a diamond.

Before you purchase, we want you to feel 100% confident with your decision and we believe that begins with being an educated buyer. We created this online diamond value calculator to enable you to easily explore your options and see firsthand how prices are affected by shape, clarity, color, and carat weight. Follow the prompts below to calculate the diamond value based on the different grades you select.

For further assistance, please visit our Newton location where we stock a large inventory of sparkling diamonds for all budgets. We will gladly share side-by-side comparisons and assist you in finding your perfect diamond.

shape
clarity
Flawless Internally Flawless Very, Very Slightly Included Very Slightly Included Slightly Included Included
color
Colorless Near Colorless Faint Very Light Light
carat
arrow-left arrow-right
clarity
Symbol KeyBack

FL

Flawless

No inclusions and no blemishes visible to a skilled grader using 10x magnification.

✖

IF

Internally Flawless

No inclusions and only blemishes are visible to a skilled grader using 10x magnification.

✖

VVS1

Very, Very Slightly Included

Minute inclusions that range from extremely difficult to very difficult to see are visible to a skilled grader using 10x magnification.

✖

VVS2

Very, Very Slightly Included

Minute inclusions that range from extremely difficult to very difficult to see are visible to a skilled grader using 10x magnification.

✖

VS1

Very Slightly Included

Minor inclusions that range from difficult to somewhat easy to see are visible to a skilled grader using 10x magnification.

✖

VS2

Very Slightly Included

Minor inclusions that range from difficult to somewhat easy to see are visible to a skilled grader using 10x magnification.

✖

SI1

Slightly Included

Noticeable inclusions that range from easy to very easy to see are visible to a skilled grader using 10x magnification.

✖

SI2

Slightly Included

Noticeable inclusions that range from easy to very easy to see are visible to a skilled grader using 10x magnification.

✖

I1

Included

Obvious inclusions are visible to a skilled grader using 10x magnification and may affect transparency and brilliance.

✖

I2

Included

Obvious inclusions are visible to a skilled grader using 10x magnification and may affect transparency and brilliance.

✖

I3

Included

Obvious inclusions are visible to a skilled grader using 10x magnification and may affect transparency and brilliance.

GIA Clarity Scale
FL
IF
VVS1
VVS2
VS1
VS2
SI1
SI2
I1
I2
I3
Flawless Internally Flawless Very, Very Slightly Included Very Slightly Included Slightly Included Included

Clarity Grading

Move the slider to view examples of different diamond clarity grades. Click marker for more information.

Key to Symbols

  • Laser Drill Hole
  • Crystal
  • Needle
  • Pinpoint
  • Cloud
  • Twinning Wisp
  • Knot
  • Feather
  • Chip
  • Cavity
  • Bruise
  • Indented Natural
  • Natural
  • Extra Facet

Polish Lines - Fine parallel grooves and ridges left by polishing, can occur on any facet but do not cross facet junctions; transparent or white.

Pinpoint - A very small crystal trapped inside the diamond during growth that looks like a tiny speck at 10x magnification.

Pinpoint - A very small crystal trapped inside the diamond during growth that looks like a tiny speck at 10x magnification.

Crystal - Mineral trapped inside of the diamond during growth.

Crystal - Mineral trapped inside of the diamond during growth.

Crystal - Mineral trapped inside of the diamond during growth.

Feather - General trade term for a break in a gemstone, often white and feathery in appearance.

Crystal - Mineral trapped inside of the diamond during growth.

Pinpoint - A very small crystal trapped inside the diamond during growth that looks like a tiny speck at 10x.

Feather - General trade term for a break in a gemstone, often white and feathery in appearance.

Cloud – Many tightly grouped pinpoints that might be too small to distinguish individually but together have a hazy appearance.

Feather - General trade term for a break in a gemstone, often white and feathery in appearance.

Cloud - Many tightly grouped pinpoints that might be too small to distinguish individually but together have a hazy appearance.

Crystal - Mineral trapped inside of the diamond during growth.

Feather - General trade term for a break in a gemstone, often white and feathery in appearance.

color

Colorless (D)

GIA Color Scale
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Colorless Near Colorless Faint Very Light Light

Color Grading*

Move the slider to view examples of different diamond color grades.

*Calculation not available for colors N-Z.

carat

Carat Weight*

Move the slider to view examples of different diamond carat weight.

*Calculation not available for stones less than 0.50ct.

calculate

The price of a diamond is generally calculated by its clarity, color, and carat weight, as illustrated with our diamond value calculator. The other major impactor of a diamond’s value is the quality of the cut —its proportions, brightness, fire, and scintillation—which, together with clarity, color, and carat make up the 4Cs. Other factors that affect the value of a diamond include diamond material and the presence of fluorescence in the diamond. To account for such characteristics that are unique to each diamond, our diamond calculator presents a range of prices.

To receive in-person guidance beyond the 4Cs from trusted and experienced jewelers, we welcome you to our Newton location. Please schedule an appointment to learn more about diamonds and see the precise differences, and all your options, firsthand.

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