Ready, set, GROW! UB chemist’s crystal contest gives kids nationwide a chance to shine

Two people standing in front of a tall triangular stack of bottles holding a crystal-growing chemical.

UB Associate Professor of Chemistry Jason Benedict (left) and UB chemistry PhD candidate Eric Sylvester prepare to ship crystal-growing supplies to participants in this year's contest. Credit: Douglas Levere/University at Buffalo

Children have five weeks to grow the biggest, most beautiful crystals, with a chance to win a cash prize

Release Date: October 19, 2017

A huge pile of boxes.
A student taping boxes in the lab.

UB chemistry PhD candidate Eric Sylvester preps boxes that will be used to ship supplies to contest entrants. Credit: Douglas Levere/University at Buffalo

BUFFALO, N.Y. — National Chemistry Week starts on Oct. 22 this year, and to celebrate, kids across the country will grab beakers and begin growing crystals from a nontoxic chemical called aluminum potassium sulfate.

It’s all part of the U.S. Crystal Growing Competition. Now in its fourth year, the event challenges K-12 students and teachers to grow the biggest, highest-quality crystal. Winners receive prizes of up to $200.

“It’s going to be a lot of fun,” says contest founder Jason Benedict, PhD, an associate professor of chemistry in the University at Buffalo College of Arts and Sciences. “We’re really excited because the contest has basically doubled in size since last year.”

More than 160 teams have requested materials for 2017 — up from about 90 last year and 40 in 2014, the contest’s inaugural year. The 160 teams this year will include about 4,000 participants, as many teams include entire K-12 classes.  

Benedict runs the competition with regional coordinators from the University of Central Florida, Georgetown University and Texas A&M University. UB students also help.

“I like how easy it is for younger students to get in on this. It’s a simple way to get them into science,” said UB chemistry PhD candidate Eric Sylvester on Oct. 18 as he unfolded a mountain of postal boxes that will be used to ship free crystal-growing materials to participants.

Funky crystal challenge

A box holding bottles of a crystal-growing chemical and other supplies.

Contest entrants get free crystal-growing supplies, along with National Chemistry Week swag from the American Chemical Society. Credit: Douglas Levere/University at Buffalo

A good aluminum potassium sulfate crystal is colorless, transparent and octahedral (meaning it has eight primary sides), and in past years, perfection in these areas made a winner.

Judges will be looking for these traits again in the contest’s “Best Overall” and “Highest Quality” crystal categories.

But a new prize class for 2017 adds a twist: Judges will also be picking the “Coolest Crystal."

For participants, this can mean growing a funky-shaped crystal, trapping an object inside a crystal, or coloring crystals using dye or metal salts, or otherwise adding a creative flourish.

According to the contest’s official 2017 handbook, “Judges will consider originality, aesthetics, and difficulty when determining the Coolest Crystal!”

All about alum

A clear crystal against a white background.

A good alum crystal is colorless, transparent and octahedral. Credit: Douglas Levere/University at Buffalo

Clear crystals of varying sizes against a white background.

Crystals grown from aluminum potassium sulfate. Credit: Douglas Levere/University at Buffalo

Aluminum potassium sulfate, also called alum, is a nontoxic chemical used in water purification.

Students will grow crystals by dissolving powdered alum into water, then letting the water evaporate slowly. This causes the compound to emerge from the solution and slowly form a crystal.

The trick to growing a superb crystal is fine-tuning the evaporation rate: Let the water disappear too slowly, and the crystal will grow very slowly. Go too fast, and too much of the compound will crystallize, leading to imperfections called “occlusions,” or even to multiple crystals forming instead of a single large one.

Of course, these weird, imperfect crystals could be “Coolest Crystal” winners this year. Who knows?

The contest is sponsored by the American Crystallographic Association, the UB Department of Chemistry in the College of Arts and Sciences, the Western New York section of the American Chemical Society, Bruker, The Cambridge Crystallographic Data Centre, Krackeler Scientific Inc., the National Science Foundation and Ward’s Science.

Along with free crystal-growing supplies, all entrants will receive National Chemistry Week swag — including a pencil, pin and temporary tattoos — supplied by the American Chemical Society.

A scientist holding a crystal in the lab.

Contest founder and organizer Jason Benedict, UB associate professor of chemistry.

Media Contact Information

Charlotte Hsu
News Content Manager
Sciences, Economic Development
Tel: 716-645-4655
Twitter: @UBScience
Pinterest: UB Science