Skip to main contentSkip to navigationSkip to footer
  • About
  • Reviews
  • Contact
  • SearchToggle Toolbar Search Menu
  • AccountToggle My Account Menu
    Forgot Password?

    Don't have an account? Sign up now

  • My Wish ListToggle My Wish List
  • My Cart (0)Toggle My Shopping Cart
Jewel Smiths logo
  • Shop All
    Jewelry by Category
    BridalFashion RingsEarringsNecklaces & PendantsChainsBraceletsCharms & Charm BraceletsReligious JewelryLab Grown Diamond Jewelry
    The Classics
    Diamond StudsTennis BraceletsBangle BraceletsHalo Pendants
    Diamonds
    Fashion RingsEarringsNecklaces & PendantsBracelets
    Gemstones
    Fashion RingsEarringsNecklaces & PendantsBracelets
    Precious Metals
    Fashion RingsEarringsNecklaces & PendantsBracelets

    Explore All Shop All
  • Bridal
    Build Your Own Ring
    SolitaireSide StonesThree StoneHaloPaveVintageSingle RowBypassShop All Styles
    Shop Now
    Engagement RingsWomen's Wedding BandsMen's Wedding BandsBridal Sets
    Custom Bridal Jewelry
    Bridal ConsultationsLoose DiamondsStart with a Design

    Explore All Bridal
  • Diamonds
    Loose Diamonds
    RoundPrincessEmeraldOvalCushionRadiantPearHeartMarquiseAsscherView All
    Diamond Jewelry
    Diamond StudsTennis BraceletsFashion RingsEarringsNecklaces & PendantsBraceletsLab Grown Diamonds
    Education
    The 4Cs of DiamondsLearn About Natural DiamondsLearn About Lab Grown Diamonds

    Explore All Diamonds
  • Gemstones
    Popular Gemstones
    AlexandriteAmethystAquamarineBlue SapphireEmeraldMoissaniteOpalPearlRuby
    Gemstone Jewelry
    Fashion RingsEarringsNecklaces & PendantsBracelets
    Education
    Find Your BirthstoneCaring for Gemstone JewelryStone Buying Guide

    Explore All Gemstones
  • Custom
    Learn About Our Process
    Jewelry Restoration
    Upgrading Your Old Jewelry
    Book an Appointment
    Engagement Ring Builder
    Custom Jewelry Gallery

    Explore All Custom
  • Services
  • About
  1. Home
  2. Education
  3. Diamonds

Learn About Diamonds

The Four Cs of Diamonds

Our Four C's of Diamonds guide can help you decide on the most important factors when shopping for a diamond.

  • Carat
  • Cut
  • Color
  • Clarity

The Carat Weight

The word carat derives from the word carob, a Mediterranean seed, which has an extremely consistent weight for measuring. The greater the carat weight, the rarer, and more valuable the diamond becomes. Five metric carats weighs exactly 1 gram.

Some people want the largest diamond possible. If size is a priority, we at Jewel Smiths can help you classify the proper cut, color and clarity to fit your budget economically, and fit your jewelry beautifully. Many of our engagement rings can fit diamonds up to 5.00 carats, but each ring has different size constraints based on its size and the type of setting. Prong settings can be manipulated to fit virtually any size diamond, but tension-set diamonds and bezel set diamonds have more limitations on size.

The Cut

The true definition of cut is the quality of the proportions and symmetry of the diamond. Your diamond's proportions make a vast difference on how brightly your diamond shines. An 'ideal cut' diamond is one that allows the maximum amount of light to return through the top of the diamond, which takes into consideration the depth, table size, crown height and angle, girdle thickness and more. Our diamond professionals will be happy to assist you in selecting the best diamond cut.

After a rough diamond is mined, it is evaluated to determine its best possible cut, in order to maintain the maximum clarity, color, and carat weight. The term 'cut' is often confused with diamond 'shape', such as round brilliant or princess cut.

Excellent

This is the rarest cut grade and reflects the most light.

Very Good

This cut grade reflects nearly as much light as an Excellent cut grade, but for a lower price.

Good

This cut grade reflects most of the light that enters the diamond, but not as much as a Very Good cut grade.

Fair

This cut grade may appear dull or even glassy, and is very inexpensive.

Poor

This cut grade is not carried by Jewel Smiths and is typically not recommended.

Excellent
Very Good
Good
Fair
Poor
Not carried by Jewel Smiths

MORE DIAMONDS

The Color

Color is one of the more noticeable attributes of a diamond and has a heavy impact on the price of the stone. Diamonds range from colorless to yellow or light brown, and are sometimes found in a spectrum of fancy colors, including yellow, blue, and even red diamonds. The less color, the rarer the diamond. After 'Z' on the color scale, diamonds become fancy yellow, which cost more because of their rarity.

Z-N
M-K
Noticeable Color
J
I
H
G
Near Colorless
F
E
D
Colorless
Z-N
M-K
J
I
H
G
F
E
D
Noticeable Color
Near Colorless
Colorless

The Clarity

Diamonds are composed of mostly carbon. During the heating process, other elements become trapped inside, giving each diamond its own unique fingerprint. These inclusions help identify the clarity of your diamond. All diamonds are viewed through a 10x magnification lens by diamond graders.

Flawless

No inclusions or blemishes are visible to a skilled grader.

Internally Flawless

No inclusions and only blemishes are visible to a skilled grader.

Very Very Slightly Included

Inclusions are difficult for a skilled grader to see.

Very Slightly Included

Inclusions are clearly visible but can be characterized as minor.

Slightly Included

Inclusions are noticeable to a skilled grader.

Included

Inclusions are obvious and may affect transparency and brilliance.

FFlawless
IFInternally Flawless
VVS1
VVS2
Very Very Slightly Included
VS1
VS2
Very Slightly Included
SI1
SI2
Slightly Included
I1
I2
I3
Included

MORE DIAMONDS

Shop Loose Diamonds

JewelSmiths

Successor to Samuel Gordon Jewelers
(Family Jewelers since 1904)

JewelSmiths
6517 N May Ave
Suite A
Oklahoma City, OK 73116-4838
(405) 848-1688
Store Information
Hours
Mon - Fri:10:00am - 6:00pm
Saturday:11:00am - 4:00pm
Sunday:Closed
Follow Us
Education
  • Jewelry Education
  • The Four Cs of Diamonds
  • Diamond Buying Tips
  • Choosing the Ring
  • Birthstone Guide
  • Gemstone Guide
  • Precious Metals
  • Caring for Fine Jewelry
  • Diamond Cleaning
  • Gemstone Cleaning
  • Anniversary Guide
  • Gold Buying Guide
Collections
  • 302
  • Allison Kaufman
  • Andrea Candela
  • Ashi
  • Barkevs
  • Chatham
  • Doves Jewelry
  • Ever & Ever
  • Galatea
  • Lau International
  • Leslie's
  • Ostbye
  • Parade
  • Paramount Gems
  • Parle
  • Piazza Di Spagna
  • Rembrandt Charms
  • Royal Chain
  • S. Kashi & Sons
  • Saturn Jewels
  • Shimmering Diamonds
  • Stuller
Our Store
  • About Us
  • Return Policy
  • Services
  • Privacy Policy
Subscribe to Our Newsletter

Signup for special offers and discounts.

  • Oklahoma Jewelers Association

© 2025 Jewel Smiths. All Rights Reserved. Website designed, maintained, and hosted by Punchmark. Accessibility Statement.

Learn how we use cookies in our Privacy Policy or manage cookie preferences.