What is the birthstone for April?

The primary birthstone for April is the diamond, recognized since 1912 by the American National Retail Jewelers Association's modern birthstone list. White topaz is the most widely accepted alternative birthstone for April.

What is the Mohs hardness of a diamond?

Diamond scores 10 on the Mohs hardness scale — the maximum possible value. It is the hardest natural substance on Earth, roughly 4 times harder than corundum (Mohs 9) in absolute terms. This extreme hardness makes diamonds ideal for all jewelry types, including everyday rings.

What does diamond symbolize?

Diamond symbolizes eternal love, invincibility, clarity, and purity. The name comes from the ancient Greek "adamas," meaning unconquerable. Throughout history it has represented strength, royalty, and enlightenment, and today it remains the most popular gemstone for engagement rings worldwide.

What is white topaz and how does it compare to diamond?

White topaz is a colorless variety of the mineral topaz (Al₂SiO₄(F,OH)₂) with a Mohs hardness of 8. It has a lower refractive index than diamond, so it does not display the same fire or brilliance, but it is far more affordable and still makes an attractive, durable birthstone for April.

What are the 4 Cs of diamond quality?

The 4 Cs are Cut (proportions and faceting that determine brilliance), Color (graded D–Z, with D being colorless), Clarity (the absence of inclusions or blemishes), and Carat (the weight of the stone, 1 carat = 0.2 grams). Cut has the greatest effect on a diamond's visual beauty.

How do I care for a diamond?

Clean diamonds with warm soapy water and a soft brush. Diamonds attract grease, so regular cleaning restores brilliance. Ultrasonic and steam cleaners are safe for most diamonds (avoid them for fracture-filled or coated stones). Store diamonds separately because they can scratch other gems — and each other.

How do I care for white topaz?

Clean white topaz with warm, soapy water and a soft cloth. Avoid ultrasonic and steam cleaners, as topaz has perfect basal cleavage and can be damaged by vibration or sudden temperature changes. Store separately from harder gems to prevent scratching.

Where do diamonds come from?

The world's major diamond-producing countries are Russia (Yakutia region), Botswana, Canada (Northwest Territories), Australia (Argyle mine), and the Democratic Republic of Congo. Natural diamonds form roughly 100–200 km below the Earth's surface under extreme heat and pressure and reach the surface through volcanic pipes called kimberlites.

April Birthstone

Name: April Birthstone
Availability: InStock
Author: Nham Vu

Explore April's birthstone: the diamond — the hardest natural substance on Earth — plus white topaz as a budget-friendly alternative, with history, meanings, care tips, and gift ideas.

Diamond

Primary

Pure Carbon — C (cubic)

Diamond is pure crystalline carbon in a cubic crystal structure. The hardest natural substance on Earth (Mohs 10), it forms roughly 100–200 km underground under extreme heat and pressure. Its name comes from the ancient Greek adamas, meaning "unconquerable." Diamond is the universally recognized symbol of eternal love and is the world's most popular gemstone for engagement rings.

Hardness 10 / 10

Color Colorless to fancy

White Topaz

Alternative

Aluminum Silicate Fluoride — Al₂SiO₄(F,OH)₂

White topaz is the colorless variety of topaz, a silicate mineral of aluminum and fluorine. With a Mohs hardness of 8, it is durable and brilliant, though it lacks diamond's extraordinary refractive index. It is widely recognized as an affordable April birthstone alternative, offering a clean, clear sparkle at a fraction of diamond's cost.

Hardness 8 / 10

Color Colorless / white

Diamond — Key Facts

Mineral Composition

Pure Carbon (C)

Diamond is the only gemstone composed of a single element — carbon atoms arranged in a face-centered cubic crystal lattice. This tight atomic bonding is what makes it the hardest natural substance known.

Color Range

Colorless (D) to yellow/brown; fancy colors

The GIA grades colorless diamonds D (perfectly colorless) through Z (light yellow). Beyond Z, intense yellows, blues, pinks, greens, and reds are classified as "fancy color" diamonds and are often more valuable than colorless stones.

Mohs Hardness

10 / 10

Diamond tops the Mohs scale at 10, meaning no natural mineral can scratch it. In absolute (Vickers) hardness, diamond is roughly 4 times harder than corundum (Mohs 9) and nearly 10 times harder than topaz (Mohs 8).

Refractive Index

2.417 – 2.419

Diamond's exceptionally high refractive index causes light to bend sharply inside the stone. Combined with strong dispersion (0.044), this creates the characteristic fire and brilliance that makes diamonds sparkle so intensely.

Primary Sources

Russia, Botswana, Canada, Australia

Russia's Yakutia region and Botswana's Jwaneng mine are the world's top producers by volume and value. Canada's Northwest Territories, Australia's Argyle mine (now closed), and South Africa's Kimberley region are also historically significant.

Birthstone Since

1912 (modern list)

Diamond was officially designated the April birthstone in 1912 by the American National Retail Jewelers Association. It is also the traditional gift for 60th and 75th wedding anniversaries.

White Topaz — Key Facts

Mineral Family

Topaz (Neosilicate)

Topaz is an aluminum silicate fluoride hydroxide. The "white" or colorless variety is actually the purest form — all color in topaz comes from impurities or structural defects in the crystal.

Color

Colorless / white

In its purest state, topaz is completely colorless. Trace element impurities produce blue, yellow, pink, and other colors. White topaz specifically refers to the colorless, gem-quality form used as a diamond alternative.

Mohs Hardness

8 / 10

At Mohs 8, white topaz is harder than most gemstones but has perfect basal cleavage — it can split cleanly along one direction if struck sharply. This makes protective settings (such as bezels) preferable for rings.

Refractive Index

1.610 – 1.638

White topaz has a moderate refractive index, lower than diamond's 2.417. It sparkles but does not exhibit diamond's characteristic fire (spectral color dispersion). Under close inspection, the difference in brilliance is noticeable.

Primary Sources

Brazil, Pakistan, Sri Lanka

Brazil is the world's largest topaz producer (Minas Gerais and Ouro Preto regions). Other significant sources include Pakistan (Katlang), Sri Lanka, Russia (Ural Mountains), and Nigeria.

Value vs. Diamond

Significantly more affordable

White topaz costs a small fraction of diamond's price for equivalent size and clarity — often under $50 per carat vs. thousands for diamond. It is a practical choice for large statement pieces or everyday jewelry.

Mohs Hardness Comparison

How diamond and white topaz rank against common gemstones on the Mohs scale.

Diamond (April)

Corundum (Ruby/Sapphire)

White Topaz (April alt.)

Aquamarine (Beryl)

7.75

Quartz / Amethyst

Feldspar

Glass

5.5

Apatite

The Mohs scale is ordinal — equal steps do not represent equal differences in absolute hardness. Diamond is approximately 4× harder than corundum (Mohs 9) in absolute terms.

History & Symbolism

Diamond

Ancient India (3rd century BC and earlier)

The earliest known use of diamonds comes from India's Golconda region. Ancient Sanskrit texts such as the Arthashastra describe diamonds as prized commodities. Indian warriors embedded diamonds in their shields, believing the stones would confer invincibility and ward off evil.

Greece & Rome

The ancient Greeks named the stone "adamas" (unconquerable). They believed diamonds were splinters of falling stars or tears of the gods. Romans associated diamonds with Cupid's arrowhead — an early link to love and romance that resonates strongly in modern engagement traditions.

Medieval Europe

Medieval Europeans believed diamonds could only be softened with goat's blood, and that they could cure illness, protect against poison, and bring victory in battle. Kings wore diamonds in battle armor. Diamonds were ground into powder and used in (largely ineffective) medical treatments.

Renaissance & Engagement Rings

The first recorded diamond engagement ring was given by Archduke Maximilian of Austria to Mary of Burgundy in 1477. This started a trend among European nobility. Diamonds were still rare and expensive, reserved exclusively for royalty and the very wealthy.

South African Discovery & Modern Era

The discovery of diamonds in Kimberley, South Africa, in 1867 transformed the global supply. De Beers Consolidated Mines was founded in 1888 and controlled most world production. The famous 1947 advertising slogan "A Diamond Is Forever" cemented diamonds as the standard engagement gift and remains one of the most recognized ad campaigns in history.

White Topaz

Ancient Origins

The name "topaz" is believed to derive from the ancient Sanskrit word "tapas," meaning fire, or from Topazios — a small island in the Red Sea (modern Zabargad) where yellowish stones (likely peridot) were mined by the Romans and called topaz. True topaz was not distinguished from other colorless gems until the 18th century.

Medieval Europe

Medieval Europeans assigned topaz strong healing and protective powers. It was believed to sharpen intelligence, ward off sudden death, and cure lunacy when worn around the neck. Yellow topaz (often confused with citrine) was the primary form known in the Middle Ages.

Imperial Topaz

In the 18th and 19th centuries, the pink-orange "imperial topaz" from Brazil's Ouro Preto mines became especially coveted by Russian and Portuguese royalty. Colorless topaz was less fashionable until the modern era, when it found its role as a diamond simulant.

Modern Role

White topaz gained recognition as a diamond alternative in the 20th century, particularly as consumers sought affordable options that shared diamond's colorless appearance. It is now widely available in fine jewelry and is recognized as one of the accepted April birthstone alternatives.

Care Tips

Diamond

Clean regularly with soapy water

Diamonds attract grease and oil, dulling their sparkle quickly. A soft toothbrush, mild dish soap, and warm water restores brilliance. Clean every 1–2 weeks for everyday rings.

Ultrasonic and steam cleaning safe

Most diamonds are safe in ultrasonic and steam cleaners. Exception: avoid these methods for fracture-filled, laser-drilled, or coated diamonds, which can be damaged by heat or vibration.

Store diamonds separately

Despite being the hardest gem, diamonds can scratch other diamonds and all other gemstones. Keep each piece in its own pouch or compartment in your jewelry box.

Protect the setting, not just the stone

The diamond itself is virtually indestructible in normal wear, but prong settings can loosen over time. Have settings inspected by a jeweler annually, especially for daily-wear rings.

White Topaz

Use warm soapy water only

Gently clean with a soft cloth, mild soap, and warm (not hot) water. Rinse thoroughly to remove any soap residue that can dull the surface.

Avoid ultrasonic and steam cleaners

Topaz has perfect basal cleavage — one direction along which it can split cleanly. Ultrasonic vibrations and sudden temperature changes from steam cleaners can trigger this cleavage. Always hand-clean.

Protect from hard impacts

While topaz is very hard (Mohs 8), its cleavage plane means a sharp blow from the right angle can cause it to split. Bezel settings offer the best protection for rings worn daily.

Store away from harder gems

White topaz can be scratched by diamonds and corundum (ruby/sapphire). Store in a fabric-lined pouch or individual compartment to prevent contact with harder stones.

Gift Ideas for April Birthdays

Diamond Solitaire Ring Diamond

A round brilliant or princess-cut diamond in a classic prong setting — timeless, versatile, and the quintessential April birthstone gift for milestone occasions.

Diamond Stud Earrings Diamond

Round brilliant diamond studs are among the most wearable jewelry pieces ever made. A gift that suits any age, style, or occasion.

Diamond Pendant Necklace Diamond

A solitaire diamond on a delicate gold or platinum chain is an elegant and sentimental choice for an April birthday, anniversary, or special milestone.

White Topaz Halo Ring White Topaz

A halo setting maximizes the sparkle of white topaz by surrounding the center stone with smaller accent stones — a stunning look at an accessible price.

White Topaz Drop Earrings White Topaz

Faceted white topaz in silver or white gold drop earrings offer brilliant sparkle for a fraction of the cost of diamond equivalents.

Birthstone Stacking Band Both

A slim, pavé-set band of diamonds or white topaz makes a beautiful addition to a stacking ring collection — wearable every day and easily layered.

Birthstone by Month

Select any month to look up its birthstone.

Summary

Explore April's birthstone: the diamond — the hardest natural substance on Earth — plus white topaz as a budget-friendly alternative, with history, meanings, care tips, and gift ideas.

How it works

April's primary birthstone is the diamond (recognized on the modern list since 1912).
White topaz is the most widely accepted alternative for April, prized for its clarity at a lower cost.
Browse the hero cards to compare diamond and white topaz side by side.
Explore the Key Facts grids for mineral family, color, hardness, and origin details.
Read the History and Symbolism section to understand the cultural legacy of each stone.
Check Care Tips to keep your April birthstone jewelry in top condition.
Use the Gift Ideas section to find the perfect April birthday present.
Use the month selector at the bottom to look up birthstones for any other month.

Use cases

Find a meaningful birthstone gift for an April birthday.
Learn why the diamond is the hardest natural material (Mohs 10) and what that means for jewelry.
Understand the difference between diamond and white topaz before buying.
Discover the historical symbolism of diamonds across ancient cultures.
Care for diamond or white topaz jewelry properly to maintain brilliance.
Explore affordable alternatives to diamond for April birthstone gifts.
Plan an April-themed birthstone jewelry collection.
Look up birthstones for any month using the interactive month selector.

Frequently Asked Questions

Last updated: 2026-06-10 · Reviewed by Nham Vu