Synthetic Star Ruby in Round Cabochon Cut

About Synthetic Star Ruby

Synthetic star ruby is laboratory-created corundum, the mineral form of aluminium oxide (Al₂O₃). Chromium usually gives it a red colour, ranging from pinkish red to deep red. It is generally translucent rather than perfectly transparent, because fine, needle-like inclusions create the star effect, or asterism. When the stone is cut as a smooth cabochon and illuminated from above, these aligned inclusions can reflect light as…