Diamond Guide

This guide is your sparkling companion, ready to help you on your journey to finding the perfect diamond, all the way from the Earth's heart to your fingertip.

Understanding Diamonds

At Eternate, we simply can't get enough of diamonds. Their breathtaking brilliance and captivating allure never fail to bring joy both to our customers and to us. Their remarkable spark and irresistible twinkle have a way of lighting up any piece of jewelry. But have you ever wondered how these tiny treasures are formed?

Millions of years in the making, deep within the Earth, carbon atoms forged an extraordinary journey. Under immense heat and pressure over billions of years, they metamorphosed into the exquisite gem we know today as diamond. However, it wasn't until the volcanic eruptions that ascended diamonds and carried them upward through molten rock that they finally sparkled upon the Earth's surface. From the moment the first one was discovered, thousands of years ago in ancient India, diamonds have remained treasures beyond compare.

To help you find the perfect diamond that reflects your style, budget and preferences, we’ve created a comprehensive diamond guide. This guide will walk you through all the important aspects to consider before choosing and buying your sparkling companion.

The 4Cs of Diamond

Choosing a diamond is an exciting step, and we understand you want to feel confident about your selection. But understanding and navigating the realm of diamonds can be daunting without proper guidance. That's where the 4Cs come in handy. The 4Cs – cut, color, clarity and carat, are your key to understanding a diamond’s beauty, quality and value. Considering these factors will help you find a diamond that sparkles brilliantly and fits your budget and taste perfectly. 

The 4Cs of diamonds is an industry standard, fundamental framework put forward by the Gemological Institute of America (GIA) in the 1940s. It stands for cut, color, clarity and carat weight of a diamond. Each of these characteristics are graded and documented by professionals. As a universal scale to assess and determine the quality of diamonds, this framework allows enthusiasts and buyers alike to define, assess and appreciate diamonds with confidence and consciousness.



A diamond's cut is the artistry behind the stone’s proportions, facet arrangement and overall symmetry. These elements work together to influence how the stone interacts with light. The cut is one of the most important factors determining a diamond's brilliance, fire and sparkle. The quality of a diamond’s cut is graded on a scale from Excellent to Poor. So, the better the cut, the more valuable your diamond will be and the more beautifully it will dance with light.

Cut Grading System

The Gemological Institute of America (GIA) established a scientific system to assess a diamond's cut quality. This system considers the stone’s proportions and design, how light interacts with it (brilliance, fire, scintillation), and the quality of its craftsmanship which has to do with polish and symmetry. GIA's cut scale ranks diamonds along a five-point scale ranging from Excellent to Poor.



Diamond color is about the absence of color and how close a diamond is to be colorless. The diamond color scale goes from D to Z, with D representing completely colorless stones and Z indicating a faint yellow or brown tint. The closer a diamond gets to D on the scale, the rarer and more valuable it becomes.


Diamond clarity refers to its purity and how clear it naturally is. This implies the absence of tiny flaws known as inclusions within the stone and imperfections on its surface which are called blemishes. Clarity is graded on a scale ranging from Internally Flawless to Included, and it impacts a diamond's beauty and rarity.



Carat is a universal measurement unit of a diamond’s weight. One carat is approximately equivalent to the weight of a paperclip. Carat is the most important element affecting the price of a diamond as it has to do with its mass and size.

Diamond Shapes

Diamonds sparkle in more ways than one. They come in a variety of geometric forms, referred to as shape and with each adding a distinct personality to the stone. Each diamond shape has its own unique set of requirements and technical considerations. The shape you choose can therefore dramatically affect the overall look and feel of your stone.

It’s important to note that the shape and cut are two different aspects. Cut describes how the facets are arranged on the inside of the diamond, which impacts its brilliance greatly. Shape, on the other hand, refers simply to its outline. The most popular choice is the round brilliant diamond that is known for its classic fire and sparkle. But there's a whole world of fancy shapes to explore, like emerald, oval, radiant or marquise. You can learn more about each shape and how it can influence the overall design of your ring in our comprehensive engagement ring guide.

Diamond Shapes

Diamond Hardness and Durability

Diamonds rank a perfect 10 on the Mohs scale which is a recognized system for measuring mineral scratch resistance. This means no other natural material can scratch a diamond and only another diamond can match its brilliance and toughness. But hardness isn't the whole story, and the concept of durability goes beyond mere surface hardness. These gems have a specific internal structure that makes them somewhat susceptible to chipping. This is why proper care is still essential for maintaining their beauty.

Caring for Your Diamond

At Eternate, we only use high quality gemstones in our fine jewelry. However to ensure these gems sparkle to their fullest potential, proper care is essential. Here are some recommendations to provide care and cleaning for your diamond so that it can stay brilliant and good as new for years to come.

Cleaning: For gentle cleaning at home, the classic combination of soap and water works well. Mix a few drops of mild dish soap in warm water. Let your diamond jewelry soak in it for 5-10 minutes, then use a soft-bristled toothbrush like a baby toothbrush to gently brush the diamond and its setting. Pay attention to the back of the stone where dirt can hide. Rinse thoroughly with clean water and pat dry with a lint-free cloth like a microfiber one.

Professional Care: While cleaning at home is great, we still recommend an annual visit to a professional jeweler. They can check the settings for looseness, which is important to prevent diamond loss, ensure everything is secure, and give your jewelry a more intensive cleaning if needed.

Storing: Diamonds may be tough, but they can scratch other gemstones and metals. To prevent this, store your diamond jewelry in a fabric-lined jewelry box with separate sections, or use individual soft cloth pouches.

Friendly Reminders: Be kind when taking off your diamond jewelry and handle it with care. Pick it up by the band, not the stone to avoid putting pressure on the setting. Keep your diamonds away from harsh chemicals like bleach or ammonia-based cleaners as they can damage the metal around and affect the sparkle.

Caring for Your Diamond

Diamond Alternatives

Diamonds are one of the most sought-after and rarest gemstones in the world and because of their rarity and popularity, they can sometimes carry a steeper price tag. But that doesn't mean you have to miss out on the sparkle. At Eternate, we offer stunning alternatives that are budget-friendly, all while maintaining the exceptional quality, durability, brilliance and fire diamonds have.

Lab-Grown Diamond

Lab-grown diamonds have the same chemical and physical properties as mined diamonds, and they boast the same fire and brilliance as them. This means light interacts with them in the same way, regardless of origin. The only difference between the two is how they are formed. Lab diamonds are created in controlled labs with minimal impact while diamonds are formed naturally within the Earth and mined thereafter. To learn more, check out our Lab-Grown vs. Natural Diamonds guide.


Moissanite is also becoming an increasingly popular choice as a diamond alternative, and for all the good reasons. Moissanites boast a higher refractive index than diamonds, which means they have fire and brilliance that can even surpass that of diamonds. Moissanites offer a comparable level of beauty and brilliance at a significantly lower price point. Visit our Moissanite vs. Diamond guide for more information.

Alternative Gemstones

Alternative gemstones also offer some fantastic advantages that make them equally compelling choices. As with other diamond alternatives, alternative gemstones tend to be budget-friendly, which allows you to get a larger or higher quality stone at a more modest price. Diamonds are known for their classic sparkle, but alternative gemstones boast a whole array of colors and different properties. From the vibrant fire of an opal to the soft green hues of a moonstone, there's a gemstone to suit every style and personality. With alternative engagement rings featuring these unique stones, you can create a truly special and unique piece of jewelry.

Finding Your Dream Diamond

We understand that with all the information and criteria to consider it can still be overwhelming to find the one that you will fall in love with to the core. So, here are some helpful, outlined tips to keep in mind before buying your diamond.

Finding Your Dream Diamond

  • The 4Cs are your friends. Cut, clarity, color and carat weight are what determine a diamond's value and beauty. Familiarize yourself with these terms to make informed choices.
  • Know yourself, know your diamond. Consider your lifestyle and taste together. Do you crave a classic round cut or something more elongated? Will you wear the ring daily, which demands durability, or is it only for special occasions? If you have an active lifestyle, for example, go for a bezel setting that offers more protection for your diamond.
  • Decide on your favorite shape. Each shape boasts unique characteristics. Round brilliant cuts, for instance, are timeless favorites known for their durability and classic brilliance. If you're drawn to a modern look, consider elegant, elongated fancy cuts like emerald, Asscher, or baguette. These cuts showcase a 'hall of mirrors' effect, where light reflects off the facets in a charming pattern.
  • Set a budget and stick to it. Diamonds come in a whole array of prices. Knowing your budget filters choices down and empowers you to find the perfect stone within your budget.
  • Consider alternatives to diamonds such as lab diamonds and moissanites. These alternatives can still offer stunning brilliance and durability all in one and also at a fraction of the price.
  • Be your own designer and create the diamond ring of your dreams. At Eternate, we offer a custom-made service to give you the chance to design your own special ring however you like. Let our skilled artisans bring your vision to life and create an heirloom piece to be cherished for generations to come.
  • Shop with confidence and feel free to ask questions. We will be happy to guide you through the selection process and ensure you feel comfortable with your choice. Contact us at service@eternate.com for any questions you might have.

Now, you’re all set to select a sparkling gem that reflects your style, speaks to your heart and celebrates every cherished moment. Remember, the perfect diamond is the one that has a piece of you and no grade or scale can determine what you like.

Diamond Guide FAQ

How to tell if a diamond is real?

You can get an idea of whether a diamond is real with a few tests you can try at home. One of them is the dot test. Place a dot on a piece of paper and put the pointed end of the diamond face down right on the dot. If you can see the dot clearly through the diamond, it's likely a fake. As real diamonds bend light, you shouldn’t be able to see the dot directly. The water test may also work. A real diamond will sink quickly due to its high density. A fake diamond may float or bob around. But for the most accurate answer, visit a jeweler. They have specialized tools to measure a diamond's thermal conductivity and refractive index, which is the most reliable way to identify the real ones.

How to identify a raw diamond?

When inspected from outside, raw diamonds don’t have the sparkle of a cut and polished ones. They'll have a rough, unpolished surface and may have a natural crystal shape. When examined closer with a magnifying tool, real diamonds often have tiny, indented triangles on their rounded edges, which only a trained eye can see. Thus, the most definitive way is to have a professional jeweler examine it for accurate results.

How to clean diamond jewelry?

For cleaning at home, mix a few drops of mild dish soap in warm water and let your diamond jewelry soak in for 5-10 minutes. Then, use a soft toothbrush and gently brush the diamond and its setting. Rinse thoroughly with clean water and pat dry with a cloth. But this will provide only the most basic care for your diamond and an annual visit to a professional jeweler is still recommended.

How much is a diamond worth?

The price of the diamond varies a lot depending on its quality, shape and elements of the 4C’s. To give you a general idea, a one-carat diamond can range from around $2,000 to $10,000 depending on these factors.

What color is a diamond?

Apart from fancy-colored ones like red, blue or pink, diamonds are usually colorless or near colorless. Colorless diamonds are the most desired and typically the most expensive ones as they exhibit minimal to no color. Some diamonds fall between colorless and fancy colored. They might have a faint yellow or brown tint, which affects their value compared to completely colorless diamonds. To learn more about color, check out our Diamond Color guide.

What is a lab grown diamond?

Lab grown diamond is a diamond created in a controlled laboratory environment and not mined from the earth. Lab diamonds are essentially the same as mined diamonds in terms of their physical and chemical makeup. The only difference between them is their origin and how they are formed. Since they can be made in a controlled setting, lab-grown diamonds are generally more affordable than mined ones of similar quality. For more details, check out our Lab-Grown vs. Natural Diamonds guide.

What is a blood diamond?

Blood diamonds are diamonds mined in areas under the control of rebel groups or warring factions that cause terror and conflict in the area. The term "blood diamond" describes the human suffering associated with the diamond trade in certain regions. It serves to raise public awareness of this dark side of the diamond industry. At Eternate, we do not trade in conflict diamonds.

What month is diamond birthstone?

The diamond is the birthstone for those born in April.