Baltimore startup Gemstone Biotherapeutics has raised $1.6 million as it races to bring to market a synthetic material for healing wounds. The financing round was led by founding investor Gamma 3 LLC in Baltimore. The new funding brings Gemstone's total seed funding to $2.45 million. Gemstone is developing a synthetic version of tissue scaffolding, a thin film of cells that doctors apply to a wound to encourage skin and tissue to regrow. CEO George Davis says using synthetic materials allows...