Education
Diamond Education
- Lab Diamonds
- History Of Lab Grown Diamonds
- Lab Diamond Shapes
- Lab Diamonds
- Lab Diamond Ring Guide
- Lab Diamond Carat Guide
- Lab Diamonds Color Guide
- Lab Diamond Shape Guide
- Lab Diamond Size Guide
- Lab Diamond Cut Guide
- Lab Diamond Jewelry Guide
- Lab Diamonds vs Moissanite
- Lab Diamonds vs. Real Diamonds
- Lab Grown Diamond vs. Cubic Zirconia
- Lab Diamonds vs. White Sapphires
- Lab Diamonds
- Diamond 4 C's
- Diamond Buying Guide
- Answers to 1 Carat Diamond Questions
- Your Guide to Buying a Diamond Online
- How to Pick the Right Diamond
- Diamond Buying Mistakes
- Real vs. Fake Diamonds
- Lab Diamond Buying Guide
- 10 Most FAQ - Diamonds
- Off Size Diamonds Guide
- Popular Diamond Cuts
- Price of a 2 Carat Diamond
- Top FAQ - Lab Diamonds
- What Is the Average Diamond Size in Engagement Rings?
- Diamond Carat
- Diamond Clarity
- IF Diamonds
- FL Diamonds
- Diamond Inclusions Guide
- Flawless vs Internally Flawless
- Which Diamond Clarity Is Best?
- VS2 vs VS1: Diamond Clarity Comparison
- VVS2 vs VVS1: Diamond Clarity Comparison
- SI2 vs SI1: Diamond Clarity Comparison
- SI1 vs VS2: Diamond Clarity Comparison
- VS1 vs VVS2: Diamond Clarity Comparison
- Accent Diamond Clarity
- Lab Diamond Clarity
- SI Diamonds
- VS Diamonds
- VVS Diamonds
- Diamond Color
- Diamond Cut
- Diamond Cut Types
- Ideal Cut Diamonds
- Hearts and Arrows Diamonds
- What is Diamond Depth
- Diamond Table
- Lab Diamond Cut
- Antique Cut Diamonds
- Brilliant Cut Diamonds
- Rose Cut Diamonds
- What Is The Most Expensive Diamond Cut?
- What Are Step Cut Diamonds?
- Diamond Bow Ties
- How Are Diamonds Cut
- Diamond Brilliance
- Spread Diamonds
- Diamond Fire
- Crushed Ice Diamonds
- Diamond Shape
- Lab Diamond Shape
- Asscher
- Cushion
- Emerald
- Marquise
- Oval
- Pear
- Princess
- Radiant
- Round
- Which Diamond Cut Is Best?
- Round vs Princess Diamond Cut
- Round vs Cushion Diamond Cut
- Cushion vs Princess Diamonds
- Cushion vs Oval Cut Diamonds
- Emerald vs Asscher Cut Diamond
- Princess vs Marquis Diamonds
- Princess vs Radiant Cut Diamonds
- Cushion vs Asscher Cut Diamonds
- Emerald vs Radiant Cut Diamonds
- Oval vs Marquise Cut Diamonds
- Oval vs Pear Cut Diamonds
- Pear vs Marquise Cut Diamonds
- Emerald vs Cushion Cut Diamonds
- Elongated Cushion Cut Diamonds
- Diamond Certification
- Diamond Fluorescence
- How Diamonds Are Formed
- Diamond Pricing
- Diamond Size Chart Carat & MM
- Diamond Symmetry
- Diamond Polish
- Diamond Girdle
- Diamond Culet
- Engraved Rings
- Fancy Colored Diamonds
- Loose Diamonds
- History Of Lab Grown Diamonds
- Natural vs Synthetic Diamonds
- Diamond Sourcing
- NY Diamond District
- Diamond Certification
- A Guide to Accent Diamonds
Engagement Ring Education
- How To Buy Engagement Rings
- Affordable Engagement Rings
- Cost of a One Carat Diamond
- How To Buy A Lab Diamond Ring
- How to Buy An Engagement Ring In a Time Crunch
- How to Choose An Engagement Ring
- How to Pick Your Engagement Ring Budget
- Engagement Rings For Second Marriage
- Best Time to Buy An Engagement Ring
- How to Buy An Engagement Ring As a Couple
- Everything You Need to Know About Dainty Engagement Rings
- Future Mother In Law's Guide to Engagement Ring Shopping
- Engagement Ring Financing
- Why You Need an Engagement Ring Appraisal
- Best Round Cut Engagement Rings
- Best Square Cut Engagement Ring
- Top Teardrop Engagement Rings
- Best Asscher Cut Engagement Rings
- Best Oval Cut Engagement Rings
- Best Radiant Cut Engagement Rings
- Best Marquise Cut Engagement Rings
- Twisting Rings
- Best Emerald Cut Engagement Rings
- Best Cushion Cut Engagement Rings
- Best Dainty Engagement Rings
- Best Unique Engagement Rings
- Best Traditional Diamond Engagement Rings
- Best Split Shank Diamond Engagement Rings
- Top 10 Square Halo Engagement Rings
- Top 10 Unusual Engagement Rings
- Black Diamond Engagement Rings
- Edwardian Engagement Rings
- Antique Style Engagement Rings
- Nature Inspired Engagement Ring
- Filigree Rings
- Art Deco Rings
- Wide Band Engagement Rings
- Infinity Engagement Rings
- Best Two Tone Diamond Engagement Rings
- Victorian Style Engagement Rings
- Minimalistic Engagement Rings
- Big Style Engagement Rings
- Cute Style Engagement Rings
- Modern Style Engagement Rings
- Past Present and Future Rings
- Thin Engagement Rings
- Pretty Style Engagement Rings
- Double Band Engagement Rings
- 1 Carat Diamond Ring
- Top Princess Cut Halo Engagement Rings
- Top Cushion Cut Halo Engagement Rings
- Top Women's Rose Gold Engagement Rings
- Top Round Halo Engagement Rings
- Top Sapphire and Diamond Engagement Rings
- Top East West Engagement Rings
- Top Pave Engagement Rings
- Top Split Shank Halo Engagement Rings
- Top Unique Halo Engagement Rings
- Rose Gold Pear Shaped Engagement Rings
- Top Yellow Gold Pear Shaped Engagement Rings
- Top Oval Halo Engagement Rings
- Top Cushion Halo Engagement Rings
- Top Yellow Gold Engagement Rings
- Top Marquise Halo Engagement Rings
- Top Yellow Gold Cushion Cut Engagement Rings
- Top Emerald Cut Three Stone Engagement Rings
- Top Bypass Engagement Rings
- Top Rose Gold Cushion Cut Engagement Rings
- Top Rose Gold Oval Engagement Rings
- Top Emerald Cut Halo Engagement Rings
- Top Yellow Gold Oval Engagement Rings
- Top Rose Gold Emerald Cut Engagement Rings
- Top Oval Three Stone Engagement Rings
- Top Floating Diamond Engagement Rings
- Top Cushion Cut Three Stone Engagement Rings
- Top Princess Cut Three Stone Engagement Rings
- Top Simple Engagement Rings
- Vintage Style Engagement Rings
- Types of Accent Diamonds
- Everything You Need to Know Before Setting Diamonds
- Engagement Ring Prong Guide
- All About Ring Resizing
- Identifying Your Ring After A Repair
- Everything You Need to Know About Milgrain
- Everything You Need to Know About Wide Band Engagement Rings
- Eternity Rings vs Infinity Rings
- When To Propose
- What Are Baguette Diamond Engagement Rings
- What to Say When You Propose
- What Are the Groom's Parents Responsible For?
Gemstone Education
Jewelry Education
- Jewelry Buying Guide
- How To Buy Jewelry Online
- Diamond: 10th Anniversary Gifts
- Ruby: 40th Anniversary Gemstone & Jewelry
- Sapphire: 5th Anniversary Gemstone & Jewelry
- Top 10 Sapphire Earrings
- Emerald: 20th Anniversary Gemstone & Jewelry
- Top 10 Push Presents
- How To Shop For Christmas Jewelry Gifts
- How To Buy An Anniversary Band
Metal Education


What are Diamond Sizes?
Diamond size is often the first aspect considered when shopping for an engagement ring--and diamond carat size is arguably the most infamous of a diamond's 4Cs.
Shop DiamondsAlthough commonly confused, diamond carat size and diamond size are not the same. Diamond carat size is a unit of weight specifically used for gemstones, with a metric “carat” quantified as 200 milligrams. Each carat is further subdivided into 100 "points," allowing for extremely precise measurements. Diamonds under one carat are often described solely by points. For example, a "twenty-five pointer" is a 0.25ct diamond.
Measuring Diamond Size
In contrast, diamond size is quite literally the size of a diamond--its diameter or length-to-width ratio as measured in millimeters. Due to differing measurements and cut proportions, not all diamonds of equal carat weight will appear the same in size. For example, varying diamond depths can cause diamonds of the same face-up size to have drastically different carat weights.
In addition, a diamond that is twice as heavy as a different stone will not necessarily appear twice as large in size. For example, when cut to ideal proportions, a 1 carat round diamond is approximately 6.5mm while a 0.5 carat diamond is approximately 5.0mm. Even though the carat weight is double, the 1 carat stone is not twice as large as the 0.5 carat diamond.
Fancy Shaped Diamonds
When it comes to fancy shaped diamonds, the diamond size, as described by the length-to-width ratio, becomes largely a matter of style. For example, for heart shaped diamonds, a 0.9mm x 1mm stone is a significantly "fuller" and rounder heart than a 1mm x 1.1mm diamond. Fancy shaped diamonds are more complex when translating diamond carat size to diamond size because of the various combinations of proportions. Two fancy shape diamonds of similar diamond carat size can easily vary dramatically in diamond size. In addition, diamond carat size can be visualized differently due to the type of gemstone, as different gemstones have different densities, affecting the diamond carat sizes.
Many shoppers commonly have trouble visualizing diamond size (mm) when given information regarding diamond carat size. A diamond size chart is a great way to effectively make diamond size comparisons, quickly translating carat to mm. As diamond size comparisons differ by the diamond's shape, be sure to look at the diamond size chart that corresponds to the correct diamond shape.
Diamond Pricing
Diamond prices rise exponentially with carat weight because larger diamonds are much less common, and thus more valuable. The general rule of thumb indicates that a diamond of double the weight costs around four times the price. In addition, remember that carat is just one of the 4Cs. Two diamonds of the same diamond carat size can easily have different prices due to differing cut, color, and clarity.
However, bigger--whether it be carat or size--is not always better. Be wary of diamonds that are priced unexpectedly low. Each carat has an ideal size proportion that optimizes its visual beauty--and falling out of that range can result in a less than magnificent diamond.
Carat Size Cutoff Weights
The typical diamond carat size cutoff weights are 0.50 ct., 0.75 ct., 0.90 ct., 1.00 ct., 1.50 ct., and 2.00 ct. If you're on a budget, consider buying diamonds below standard carat weight cutoffs. While the visual difference between a 1.50ct diamond and a 1.40ct diamond is negligible, the monetary savings isn't.
While people often fixate on carat or size when selecting a diamond, cut is actually one of the most significant factors in choosing a visually stunning diamond. Cut influences the diamond's sparkle, and diamonds with less depth and more spread often look visually larger than its carat weight.
Tips for Diamond Buying
When selecting the perfect diamond, avoid fixating on any one of the 4Cs. A beautiful diamond requires balance. Finding the perfect combination of cut, carat, color, and clarity is what truly makes for a stunning diamond.
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