The ongoing volatility in the once high-flying tech sector leaves investors with prime buying opportunities, says Firsthand Capital Management's Kevin Landis.
Growth has become a scare commodity on Wall Street after a three-day selloff focused on big-name tech stocks, Landis said Tuesday on CNBC's "Squawk Box." He pointed to three stocks that could see renewed momentum—sapphire glass maker GT Advanced Technologies, semiconductor provider LAM Research and digital media stalwart Adobe Systems.
Landis, who owns stocks in the three companies, picked GTAT because it's poised to create sapphire glass used for next generation Apple products. Newer model iPhones already use two small pieces of sapphire glass, a super-strong glass resistant to scratches and cracks, for its camera lens and fingerprint readers, Landis said.
"Sapphire is a great material that's been famously hard to work with," Landis said. "But if you can do it right, you can get a little glass display that's actually a thin sheet and you really, really cut down on the cracked cell phone screens."
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GTAT becomes an even bigger Apple play once the company starts making full displays with sapphire, Landis said. Last fall, Apple agreed to open a sapphire production plant in Arizona with GTAT running the operation.
Though others remain skeptical, Landis said he's confident that sapphire iPhone displays are in the works. Apple currently uses Gorilla Glass from Corning for its displays.
Apple didn't immediately respond to a CNBC request for comment.
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Landis said his other pick, LAM Research, should benefit from a merger between two chief rivals that has become a "bit of a mess." And Adobe has a strong digital media strategy, he added.
Oscar Schafer, chairman of Rivulet Capital, also provided his stock picks as part of "Squawk Box"'s Platinum Portfolio challenge, which pits high-performing money mangers against each other. He named home health care provider BioScrip, European data center Interxion and 3-D movie tech firm RealD as his strongest plays.
Schafer, who owns stock in those companies, believes BioScrip's home infusion products should entice a big drug store chain to make an acquisition offer, and that the stock will bounce back from big declines last year. Interxion represents a tech play that benefits from the three "megatrends" in tech, he said.
"I can't really pick the winners," Schafer said of the big tech trends. "But I can pick a company that benefits no matter what happens."
Schafer's third pick, RealD, should benefit from a renewed interest in 3-D movies thanks to Oscar-nominated space thriller "Gravity" and from upcoming installments in the "Star Wars" and "Avatar" franchises. What's more, 3-D movies are booming in Russia and China, Schafer said.
—By CNBC's Jeff Morganteen.