April Birthstone

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.

April's birthstone is the diamond, on the official list since 1912.

Use the April Birthstone

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)
10
Corundum (Ruby/Sapphire)
9
White Topaz (April alt.)
8
Aquamarine (Beryl)
7.75
Quartz / Amethyst
7
Feldspar
6
Glass
5.5
Apatite
5

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.

Quick answer

April's birthstone is the diamond, on the official list since 1912. It is pure carbon and the hardest natural mineral (Mohs 10). Most are colorless, but diamonds also come in yellow, brown, pink and blue. White topaz and white sapphire are cheaper colorless look-alikes, but neither is an official April stone.

Examples

FactDiamond
ColorColorless; also yellow, brown, pink, blue
Mohs hardness10
Made ofCarbon
Top producersRussia, Botswana, Canada
Anniversary60th and 75th
Lower-cost look-alikesWhite topaz (Mohs 8), white sapphire (Mohs 9)

Compare diamond and white topaz.

Summary

April's primary birthstone is the diamond, the hardest natural mineral known (Mohs 10) and one of the most universally recognized symbols of love, strength, and eternal commitment. White topaz serves as a popular and affordable alternative for those who prefer a softer brilliance or a lower price point (Mohs 8). Both stones are colorless to near-colorless in their purest form, making them versatile choices for all jewelry styles. This page covers the science, history, symbolism, care guidance, and gift ideas for both April birthstones.

How it works

  1. April's primary birthstone is the diamond (recognized on the modern list since 1912).
  2. White topaz is a common lower-cost colorless alternative, though it is not on the official list.
  3. Browse the hero cards to compare diamond and white topaz side by side.
  4. Explore the Key Facts grids for mineral family, color, hardness, and origin details.
  5. Read the History and Symbolism section to understand the cultural legacy of each stone.
  6. Check Care Tips to keep your April birthstone jewelry in top condition.
  7. Use the Gift Ideas section to find the perfect April birthday present.
  8. 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: 2026-06-13 · Reviewed by Nham Vu