Skip to main contentSkip to footer
  • 1 (800) 691-7986
  • Ellsworth, ME
  • Our Blog
  • News & Events
  • Share Your Story
  • Join Our Team
Ellsworth Jewelers logo
  • Engagement
    Rings by Style
    Design Your Own RingThree StoneSolitaireHaloContemporaryVictorianShop All Styles
    Rings by Type
    Just the SettingRings with Center StoneEstate RingsShop All Rings
    Wedding Bands
    Women's Wedding BandsMen's Wedding BandsAnniversary Bands
    Loose Diamonds
    Find the Perfect DiamondThe 4 Cs of Diamonds
    Custom Design
    Custom Engagement RingsCustom JewelryShop Engagement RingsGabriel & Co. Catalog
    Financing Options
    Education & More
    Choosing the Right SettingsCaring for Diamond JewelryJewelry InsuranceLearn About DiamondsAnniversary Gift Guide
    Menu image
  • Diamonds
    Diamonds by Shape
    RoundPrincessAsscherRadiantCushionOvalPearMarquiseHeartView All Diamonds
    Natural Diamond Jewelry
    Fashion RingsEarringsNecklacesPendantsBracelets
    Lab Grown Jewelry
    BraceletsEarringsNecklaces
    Popular Styles
    Diamond StudsDiamond HuggiesTennis BraceletsDiamond Cuff Bracelets
    Education
    The 4 Cs of DiamondsCaring for Diamond JewelryDiamond Buying Tips
  • Jewelry
    Jewelry by Type
    Engagement RingsWomen's Wedding BandsMen's Wedding BandsFashion RingsEarringsNecklaces & PendantsChainsBracelets
    Vintage & Estate Jewelry
    Fashion RingsEarringsNecklaces & PendantsBraceletsAnkletsMen's Estate
    Lab Grown Diamonds
    NecklacesBraceletsEarrings
    Nautical Jewelry
    Men's Jewelry
    Men's Wedding BandsMen's Estate
    Accessories
    CharmsPins & Brooches
    Gifts
  • Custom
  • Services
  • About
  • Valentine's Day Guide
  • 1 (800) 691-7986
  • Ellsworth, ME
  • Our Blog
  • News & Events
  • Share Your Story
  • Join Our Team
Ellsworth Jewelers logo
Log In My Cart
  • SearchToggle Search Menu
  • Sign inToggle My Account Menu
    Login
    Forgot Password?

    Don’t have an account? Sign up now

  • Wish ListToggle My Wishlist
  • Bag (0)Toggle Shopping Cart Menu
  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. The Four C's of diamonds are known as Carat Weight, Cut, Color and Clarity.

Diamond 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 Ellsworth Jewelers 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 five carats or more, 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.

  • Dime for size comparison
    17.9 MM
  • Search for a Round diamond, 0.10 carat (3.0mm diameter)
    0.10 CT
    (3.0 MM)
  • Search for a Round diamond, 0.15 carat (3.4mm diameter)
    0.15 CT
    (3.4 MM)
  • Search for a Round diamond, 0.20 carat (3.8mm diameter)
    0.20 CT
    (3.8 MM)
  • Search for a Round diamond, 0.25 carat (4.1mm diameter)
    0.25 CT
    (4.1 MM)
  • Search for a Round diamond, 0.5 carat (5.1mm diameter)
    0.5 CT
    (5.1 MM)
  • Search for a Round diamond, 0.75 carat (5.8mm diameter)
    0.75 CT
    (5.8 MM)
  • Search for a Round diamond, 1 carat (6.4mm diameter)
    1.0 CT
    (6.4 MM)
  • Search for a Round diamond, 1.25 carat (6.9mm diameter)
    1.25 CT
    (6.9 MM)
  • Search for a Round diamond, 1.5 carat (7.4mm diameter)
    1.5 CT
    (7.4 MM)
  • Search for a Round diamond, 1.75 carat (7.8mm diameter)
    1.75 CT
    (7.8 MM)
  • Search for a Round diamond, 2 carat (8.1mm diameter)
    2.0 CT
    (8.1 MM)
  • Search for a Round diamond, 2.5 carat (8.8mm diameter)
    2.5 CT
    (8.8 MM)
  • Search for a Round diamond, 3 carat (9.4mm diameter)
    3.0 CT
    (9.4 MM)
  • Search for a Round diamond, 3.5 carat (9.8mm diameter)
    3.5 CT
    (9.8 MM)
  • Search for a Round diamond, 4 carat (10.2mm diameter)
    4.0 CT
    (10.2 MM)
  • Search for a Round diamond, 5 carat (11.0mm diameter)
    5.0 CT
    (11.0 MM)
  • Round diamond, 6 carat (11.8mm diameter)
    6.0 CT
    (11.8 MM)
  • Round diamond, 7 carat (12.4mm diameter)
    7.0 CT
    (12.4 MM)
  • Round diamond, 8 carat (13.0mm diameter)
    8.0 CT
    (13.0 MM)
  • Round diamond, 9 carat (13.5mm diameter)
    9.0 CT
    (13.5 MM)
  • Round diamond, 10 carat (14.0mm diameter)
    10.0 CT
    (14.0 MM)
  • Round diamond, 12.5 carat (14.5mm diameter)
    12.5 CT
    (14.5 MM)
  • Round diamond, 15 carat (16.0mm diameter)
    15.0 CT
    (16.0 MM)

Diamond 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.

Diamond anatomy

Ideal

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

Excellent

This cut grade reflects a high level of craftsmanship and light performance.

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 Ellsworth Jewelers and is typically not recommended.

Diamond 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.

F
E
D
F color diamond
E color diamond
D color diamond

Colorless

J
I
H
G
J color diamond
I color diamond
H color diamond
G color diamond

Near Colorless

Z-N
M-K
L color diamond
K color diamond

Noticeable Color

Z-N
M-K
J
I
H
G
F
E
D
L color diamond
K color diamond
J color diamond
I color diamond
H color diamond
G color diamond
F color diamond
E color diamond
D color diamond

Noticeable Color

Near Colorless

Colorless

Diamond 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.

Close up of inclusions in a diamond

(F) Flawless

No inclusions or blemishes are visible to a skilled grader.

(IF) Internally Flawless

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

(VVS1-2) Very Very Slightly Included

Inclusions are difficult for a skilled grader to see.

(VS1-2) Very Slightly Included

Inclusions are clearly visible but can be characterized as minor.

(SI1-3) Slightly Included

Inclusions are noticeable to a skilled grader.

(I1-3) Included

Inclusions are obvious and may affect transparency and brilliance.

Shop Loose Diamonds
Be the first to know about our best deals!
Hours
Mon-Tue:Monday - Tuesday:
Closed
Wed-Fri:Wednesday - Friday:
9:30am - 4:00pm
Saturday:
9:30am - 2:00pm
Sunday:
Closed
Store
126 Downeast Highway
P.O. Box - 446
Ellsworth, ME 04605
(207) 610-1735
1(800) 691-7986
Store Information
Shop Now
  • Engagement
  • Fashion Rings
  • Earrings
  • Necklaces & Pendants
  • Chains
  • Charms
  • Bracelets
  • Estate Jewelry
  • Lab Grown Diamond Jewelry
  • Watches
Store Services
  • Custom Designs
  • Cleaning & Inspection
  • Corporate Gifts
  • Engraving
  • Financing
  • Jewelry Appraisals
  • Jewelry Insurance
  • Jewelry Repairs
  • Jewelry Restoration
  • Pearl & Bead Restringing
  • View All Services
Custom Care
  • About Our Store
  • Create an Account
  • My Orders
  • My Wishlist
  • Send Us a Message
  • Make an Appointment
Follow us
  • Return Policy
  • Privacy Policy
  • Terms & Conditions
  • Accessibility Statement

© 2026 Ellsworth Jewelers. All Rights Reserved.

Powered by: Punchmark

My Bag
Shopping cart contents
Loading

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