Shadows in the Glasshouse - 2000 publication

It's 1621. Twelve-year-old Meredith Shipman is kidnapped from the streets of London and taken to the Jamestown settlement in the New World. There, she's forced to be an indentured servant in the glasshouse, where Italian glassblowers are competing to be the first to make cristallo, a highly prized clear glass. Glassblowing is the most magical thing Merry has ever seen - like turning fire to ice. But the spell is shattered when a midnight intruder makes trouble, and tries to frame her only friend!