Skip to main contentSkip to navigationSkip to footer
  • EducationToggle Jewelry Education Menu
    • Jewelry Education
    • Diamond Education
      • The Four Cs of Diamonds
      • Diamond Buying Tips
    • Choosing the Ring
    • Learn About Gemstones
      • Birthstone Guide
      • Gemstone Guide
    • Precious Metals
    • Jewelry Care
      • Caring for Fine Jewelry
      • Diamond Cleaning
      • Gemstone Cleaning
    • Anniversary Guide
    • Gold Buying Guide
  • Contact
  • Make An Appointment
  • SearchToggle Toolbar Search Menu
  • (715) 785-5140
  • Toggle My Account Menu
    Forgot Password?

    Don't have an account? Sign up now

Black River Diamond Company logo
  • Bridal
    • Start with the Diamond
    • The Four Cs of Diamonds
      • Diamond Buying Tips
    • Engagement Rings
    • Custom Bridal Design
    • Wedding Bands
      • For Her
      • For Him
    • Perfect Love At BRDC
  • Designers
    • Add-A-Pearl
    • Benchmark
    • Citizen
    • ELLE
    • Forge
    • GLOCK
    • King Baby
    • Lafonn
    • Mark Schneider
    • Martin Flyer
    • MK Luxury
    • Ostbye
    • Sylvie
    • Tantalum
    • Perfect Love At BRDC
  • Jewelry
    • Rings
        Diamond Engagement RingsDiamond Anniversary RingsGents BandsLadies Colored Stone RingsGents Colored Stone RingsSilver RingsDiamond Fashion RingsLadies Gold Bands
    • Wedding Bands
        Ladies BandsMens Bands
    • Earrings
        Diamond EarringsDiamond StudsGold EarringsColored Stone EarringsSilver Earrings
    • Pendants
        Diamond PendantsColored Stone PendantsGold PendantsSilver Pendants
    • Bracelets
        Diamond BraceletsLadies Gold BraceletsSilver BraceletsGents BraceletsPearl Strand BraceletsPermanent Bracelets
    • Watches
        Gents WatchesLadies Watches
    • Necklaces
        Gold and Silver NecklacesColored Stone Necklaces
    • Pearls
        Single PearlsPearl NecklacesPearl PendantsPearl EarringsPearl Rings
    • 24K GoldDipped Roses
    • Gemstone Infused Candles
    • Permanent Jewelry
    • Emerald Birthstone Jewelry
  • Our Store
    • About Us
    • Our Blog
    • Reviews
    • Store Events
    • Media
    • Buy a Gift Card
    • Lifetime Warranty
    • Perfect Love At BRDC
  • Services
    • Jewelry Repair
    • Custom Jewelry Design
    • Check & Clean
    • Laser Engraving
    • Buying Gold & Diamonds
    • Financing Options
    • Permanent Jewelry
    • Jewelry Appraisals
  • Store Policies
    • Referral Program
    • Rewards Program
    • True Love Guarantee
    • The Perfect Love Promise
    • Trade Up Policy
    • Lifetime Warranty
    • Layaway
    • Exchange Policy
    • Shipping Info
  • Permanent Jewelry
  • AccountToggle My Account Menu
    Forgot Password?

    Don't have an account? Sign up now

  • My BagToggle Shopping Cart

    You have no items in your cart.

    Browse Jewelry
  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 Black River Diamond Company 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 Black River Diamond Company and is typically not recommended.

Excellent
Very Good
Good
Fair
Poor
Not carried by Black River Diamond Company

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

Black River Diamond Company
Black River Diamond
753 East Perkins Street
Medford, WI 54451
(715) 785-5140
Store Information
Bay Area Diamond Company
225 S. Military Ave.
Green Bay, WI 54303
(920) 494-0002
Store Information
Bay Area Diamond Company - Mundelein
742 S Butterfield Rd
Mundelein, IL 60060
(847) 680-4450
Store Information
Hours
Mon - Fri:10:00am - 6:00pm
Sat - Sun:Closed
Follow Us
Jewelry
  • Rings
  • Wedding Bands
  • Earrings
  • Pendants
  • Bracelets
  • Watches
  • Necklaces
  • Pearls
  • 24K GoldDipped Roses
  • Gemstone Infused Candles
  • Permanent Jewelry
Designers
  • Add-A-Pearl
  • Benchmark
  • Citizen
  • ELLE
  • Forge
  • GLOCK
  • King Baby
  • Lafonn
  • Mark Schneider
  • Martin Flyer
  • MK Luxury
  • Ostbye
  • Sylvie
  • Tantalum
Subscribe to Our Newsletter

© 2025 Black River Diamond Company. 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.