I attached a silver cap to a galaxy night stars crystal ball. This comes with a 24 inch silver filled chain. The crystal ball is approximately 16mm in diameter.  It has sparkly quartz inclusions that look like a field of stars against a dark blue background.

Night stars or galaxy stars gemstone is also called Star Sitara or Blue Goldstone. This is a man-made stone first created in the 15th century by alchemists trying to make gold. The blue color is created by combining silica quartz and cobalt at high temperatures.

Night stars is a calming gemstone and can provide composure. It generates a powerful energy and can stabilize emotions. It is a good stone to use for meditation and remote psychic healing.

See another night stars necklace here: https://www.etsy.com/mymysticgems/listing/1004860280

Some people have the misconception that a man-made stone is less effective than a natural gemstone when used in a metaphysical sense. This isn't really true. Because lab grown or man-made gemstones are made up of the same chemical compounds as most natural occurring gemstones, there is little difference in their mineral properties.

From the ISG:
"Creating gemstones in a lab is an art that must be learned and perfected using imagination and skill. Lab created gemstones are not imitations, they are newly created gemstones that are of the same make up as the mined gemstones. So by definition, gemstones created in a lab cannot be called synthetic because rather than imitate a gemstone...they ARE gemstones.

Stones may have some imperfections and inclusions. Be sure to check all photos, including the zoom feature, for details about a particular stone. Please see photo with ruler for size. Colors may vary with individual monitors.

Many stones are susceptible to fading, and they should be kept out of direct sunlight. Do not use hot water or salt water to clean them. Stone properties and descriptions are for informational purposes only and do not offer any guaranteed outcomes. Also, they are not intended as a substitute for medical care.