The typical size range for star rubies is 1ct to 10cts, but much larger stones exist. One of the largest fine-quality star rubies on public display is the Smithsonian Institution's 137-ct Rosser Reeves Ruby
Star Rose Quartz Star ☞ Rose quartz is opaque to translucent microcrystalline quartz of pink to rose-red colour. Some rose quartz contains microscopic rutile crystals which are oriented at right angles to the c-axis of the rose quartz in three directions, each 120 degrees apart. When viewed at a specific angle with a source of light a star-effect is visible. This is known as asterism.