Granted, this isn't the brightest piece around, but it's very intriguing. The microcline under longwave fluoresces a decent whitish blue. Under midwave, it fluoresces a soft lavender. Then under shortwave, it glows a deep red. Checked it for reflection, but it's mostly glow. The quartz glows not a bit, sadly. The piece is about 2.5 inches across. Disclaimer, I struggled getting the color correct. While they're not perfect, they're close.