How do fireworks get their colors? The answer is hidden inside minerals and metals. Every brilliant red, green, blue and yellow burst in the night sky comes from specific elements found in rocks and minerals. The next time you watch a fireworks display, you’ll be seeing a science lesson in action.
Key Takeaways
- Firework colors come from minerals and metals that burn at high temperatures.
- Copper creates blue fireworks.
- Strontium creates red fireworks.
- Barium creates green fireworks.
- Sodium creates yellow fireworks.
- Different mineral combinations create colors like orange, lavender and silver.
- Minerals also help create special effects such as sparks, flashes and loud bangs.
What’s in a Firework?
Fireworks have an outside shell that’s called a mortar. It can be made of many things, including cardboard, papier-mache or plastic.
Inside the mortar are compartments. The bottom compartment is filled with black powder (potassium nitrate, charcoal and sulfur) that will be the fuel for the firework.
The top compartment contains the pyrotechnic stars that make the colors and shapes we love to see. The stars are made of a fuel that burns and minerals and metals pressed together provide the color. The way the stars are arranged in the mortar provides the shape of the firework, like ovals, stars or rectangles.
Lighting the Fuse
While today’s fireworks have gotten more technical, a basic firework still contains just two fuses. There’s a fuse hanging from the firework.
That’s what is lit first. The firework flies into the sky and as the burning fuse reaches the bottom compartment, it ignites an internal fuse that makes the mortar explode.
How Do Fireworks Get Their Colors?
Firework colors come from specific minerals and metal compounds that burn at high temperatures and release different wavelengths of light.
Blue fireworks are created by copper compounds (Cu), often linked to minerals such as chalcopyrite.
Green fireworks come from barium compounds (Ba), commonly associated with the mineral barite.
Red fireworks are made using strontium compounds (Sr), found in the mineral celestite.
Yellow fireworks are created using sodium (Na), often sourced from halite (rock salt).
Some colors are made by carefully combining elements:
Orange fireworks = strontium (Sr) + sodium (Na)
Purple fireworks = strontium (Sr) + copper (Cu)
Purple appears when red and blue light blend together in just the right proportions. Strontium produces red tones, while copper produces blue—together they can create purple or violet effects.
Silver fireworks = titanium (Ti) + zirconium (Zr) + magnesium (Mg)
Firework Effects
Firework colors, sizes and shapes are dazzling, but the special effects step up the game. Here are a few favorite effects and the minerals that make them.
Iron Filings (magnetite and hematite) + Charcoal = Gold Sparks Aluminum Flakes = Flashes Showering Down Aluminum Powder (bauxite) = Loud Bangs & Bright Flashes
Visit a Giant Celestite Geode in Ohio
You can visit the world’s largest geode on Put-in-Bay Island in Ohio. There you descend 40 feet into a beautiful geode made of celestite, a strontium sulfate mineral and the source of the red color in fireworks. The geode is located at Heineman’s Winery and was discovered in 1897 while digging a well for the winery. It saved the winery during prohibition as the winery couldn’t sell wine, but could sell tours of the geode. The blueish-white celestite crystals vary in size from mere inches up to three feet wide. The interior of the original cave was much smaller, but some crystals were mined over the years.
Fireworks in History
Fireworks were made out of paper or bamboo in China 2000 years ago. They weren’t the beauties we have today. They produced only a flash and smoke when ignited. In America, the first fireworks were only orange colored.
The shape of modern fireworks mortars is similar to an ice cream cone. This mortar shape was started by the Italians in the 1830s. Credit also goes to the Italians for the invention of colored fireworks.
Be Careful!
Fireworks are beautiful, but they are also dangerous. If you are a kid, never handle fireworks alone!
Each year, injuries to kids and adults are reported from accidents with fireworks. Be sure to leave fireworks to the grown-ups to handle. Best yet, go with your friends and family to enjoy a fireworks display and leave the danger to those trained for it.
How Do Fireworks Get Their Colors? Frequently Asked Questions
Why are fireworks different colors?
Different minerals and metals burn in different ways. When heated, they release specific colors of light that create colorful fireworks.
What mineral makes red fireworks?
Red fireworks are created using strontium, which is found in the mineral celestite.
What mineral makes green fireworks?
Green fireworks are made using barium compounds, which are associated with the mineral barite.
What mineral makes blue fireworks?
Copper compounds, often linked to minerals such as chalcopyrite, create blue fireworks.
Who invented colored fireworks?
Italian pyrotechnic makers developed colored fireworks in the 1800s by adding different minerals and metals to firework mixtures.
How Do Fireworks Get Their Colors? Final Thoughts
The next time you watch fireworks light up the night sky, remember that minerals are helping create every colorful burst. Minerals are the answer to how do fireworks get their colors. Copper makes blues, strontium creates reds and barium produces greens. Fireworks may look like magic, but they’re really a fascinating combination of geology, chemistry and science.
This story about how do fireworks get their colors previously appeared in Rock & Gem magazine. Click here to subscribe. Story by Pam Freeman.
