White Sapphire vs. Diamond: Full Comparison

When choosing a gemstone for an engagement ring or fine jewelry, the debate often centers around diamonds and their ethical alternatives. Among these alternatives, white sapphire stands out as a popular choice. So, should you choose white sapphire or diamond? What are the differences between them? This blog will explore the key distinctions between white sapphire and diamond, helping you make a more informed decision when purchasing jewelry.

White Sapphire vs. Diamond: What’s The Difference?

1. Chemical Composition and Structure

Diamonds are made of carbon atoms arranged in a lattice structure, which gives them their famous hardness and brilliance.
White sapphire belongs to the corundum family and is composed of aluminum oxide. It typically forms in barrel-shaped, prismatic, or double-cone crystals but can also appear as granular, blocky, or rolled pebbles.

2. Hardness and Durability

Diamond has a Mohs hardness of 10, which is the hardest known natural material. As a result, diamonds are highly resistant to scratching and damage, making them ideal for daily wear.
White sapphire has a Mohs hardness of 9, which is still very high but slightly lower than diamonds. However, it remains a highly durable gemstone suitable for daily wear, though it may show some scratches over time.

3. Brilliance and Fire

Diamonds have a high refractive index (RI=2.418) and dispersion value (D=0.044), allowing them to exhibit extraordinary brilliance and fire when exposed to light.
White sapphire has a lower refractive index (RI=1.77) and dispersion value (D=0.018). While it still displays some brightness, it lacks the fire and sparkle of diamonds, appearing with a softer silver-gray light.
The refractive index affects white light (brilliance), dispersion value affects colored light (fire).

Note: The cut is one of the main factors that influence a gemstone’s brilliance and sparkle. Different cuts produce different light effects. Read about engagement ring cuts to learn more about their variations.

4. Color and Clarity

Diamonds come in a variety of colors, with colorless diamonds being the most common and popular. The clarity of diamonds ranges from flawless to included, with higher clarity diamonds being more valuable.
White sapphires are generally colorless to white, though they may sometimes show slight color hues. They tend to be more opaque than diamonds, making inclusions less noticeable.

Diamond Color Chart

Diamond Clarity Chart

Fun Fact About Diamond Clarity:

Does a high clarity diamond necessarily sparkle more than a low clarity diamond? – Not necessarily. The quality of the cut is a significant factor in determining a diamond’s sparkle. Diamonds with an S1 clarity grade and above can exhibit the same sparkle with similar cuts. Below the S1 grade, the sparkle may be affected by the presence of inclusions, which can disrupt the reflection and refraction of light.
Diamonds with lots of inclusions are bad? – Not always. Some people say that inclusions are nature’s “birthmarks” on a diamond. I couldn’t agree more with this statement! It is their unique mark. While most diamonds with inclusions may have reduced visual appeal, some, like salt and pepper diamonds, are cherished precisely for their inclusions.

5. Cost Comparison

Diamonds are much more expensive than white sapphires! Diamonds are rarer, have lower production yields, higher mining costs, and greater market demand and marketing than sapphires, making them more costly. For those who want the look of luxury without the high price tag, white sapphire is a better choice.

Carat Size	GIA Certified Diamond (Round, I Color, VS2)	White Sapphire
0.50 Carat (5mm)	$1,100+	$300+
1.0 Carat (6.5mm)	$4,000+	$600+
1.5 Carat (7.5mm)	$10,000+	$1200+

6. Ethical Considerations

Many people resist diamonds not because of their price but due to concerns about unethical mining practices and conflict diamonds, fearing that the diamond they purchase may be a “blood diamond.” Of course, not all diamonds can be labeled as blood diamonds, most diamonds come from ethical sources. For example, lab-grown diamonds are produced in laboratories, eliminating unethical mining.

In comparison, white sapphires do not raise such concerns. So, from an ethical perspective, white sapphire may seem like a more “ethical gemstone.” However, this depends on individual circumstances.

7. Symbolism

Diamonds are often associated with love and commitment, making them the traditional choice for engagement rings. Additionally, diamonds are the birthstone for April and the anniversary stone for the 10th and 60th anniversaries.
Sapphires have a long history and are known as “royal blood” gemstones, symbolizing loyalty and wealth, always making them a popular engagement ring choice. Different sapphire colors carry various meanings; white sapphires symbolize purity, wisdom, and clarity. Sapphire is also the birthstone for September and the anniversary stone for the 5th, 45th, and 75th anniversaries.

Now, Can You Tell the Difference Between Diamond and White Sapphire?

I’m sure you can! White sapphire and diamond are easy to differentiate just by appearance. White sapphire has lower brilliance and almost no fire. (Fire refers to a gemstone’s ability to disperse light and create a rainbow of colors.) Under light, diamonds sparkle with blue-white or other colored fire, while white sapphires display a soft silver-gray glow.

White Sapphire vs. Diamond: Which’s Better?

To answer this, you first need to understand the pros and cons of white sapphire compared to diamonds.

What are the advantages of white sapphire over diamond?

Affordability! Yes, this is white sapphire’s biggest advantage over diamonds. Price is a crucial factor for many shoppers, and with a similar appearance, many people prefer the more budget-friendly option. Moreover, lower costs allow you to buy a larger gemstone for the same budget, why not?

What are the disadvantages of white sapphire compared to diamond?

The biggest drawbacks are lower brilliance and lack of fire. Durability? It could be considered a disadvantage, but with a hardness 9, white sapphire is still durable enough for everyday wear, so this is not a major issue. The main difference lies in the brilliance and fire, which are immediately noticeable in appearance. Due to its lower brilliance, white sapphire requires frequent cleaning to maintain its brilliance. Whereas, the strong brilliance of a diamond allows it to sparkle even when there is light oil and dirt on the surface!

So, Which’s Right for You?

The answer largely depends on your personal preferences and values. (I think you already have the answer in your mind.)

• Choose diamonds if: you prioritize brilliance, durability, and tradition. Diamonds are a timeless symbol of love and commitment, making them the ideal choice for engagement rings. If budget is not a major concern, diamonds may be the perfect choice.
• If you prefer a more affordable option without sacrificing beauty and elegance, choose white sapphires. If ethical sourcing is important to you and you want a unique look, white sapphire is an excellent choice.

White Sapphire vs. Moissanite: Which is the Better Diamond Alternative?

I know, this is a question you’re likely curious about. As a gemstone jeweler, we get asked this question frequently. Today, let’s talk about. Should you choose white sapphire or moissanite?

It really depends on your personal preference, and there are two major differences between the two gemstones:

1. Source:
   Natural moissanite is extremely rare, rarer than diamonds! As a result, nearly all moissanite jewelry (moissanite rings, moissanite necklaces, moissanite bracelets, etc.) on the market is lab-grown, and we typically equate lab moissanite with moissanite. (This distinction is important because, unlike moissanite, other lab gemstones are often labeled as “lab” to differentiate between natural and lab-grown stones, but moissanite is always simply “moissanite.”) Whereas white sapphires are available from natural sources, if you are inclined towards natural gemstones, white sapphires are more suitable for you!
2. Sparkle:
   Above we said that white sapphires have less brilliance and fire than diamonds. If you love strong sparkle, choose moissanite, because moissanite’s sparkle is even stronger than diamonds!

Related: Moissanite vs. White Sapphire and Moissanite vs. Lab Diamond.

I think it should be almost enough for everyone to understand the difference between white sapphire and diamond. Before you buy a gemstone, make sure that it is ethically sourced and certified by a professional organization! If you trust us, you can buy from our store where all our gemstones are reliable, ethically sourced and come with an IGI Certificate of Authenticity.

Related Products