How To Identify Real Ruby Gemstones?

Step 1
Clean the ruby with a damp cloth or toothbrush to remove any debris or marks.Dig your fingernail into the gemstone to see if you can leave a scratch. If you can, it’s not a ruby.
Step 2
Gently scratch the ruby with a one cent coin. Choose an area that you don’t mind damaging slightly, such as the underside of a gemstone that will be set in a ring. If the gem marks, then it’s not a ruby.
Step 3
Scratch the gem with a series of other items. Use a piece of glass and a steel knife. The knife has a hardness level of 7 and should not be able to scratch the ruby. Scratch the red stone with rough sandpaper. If there is no noticeable effect, then the gem is likely to be a genuine ruby.
Step 4
Rub the ruby against a clean white porcelain tile. If it’s real, the ruby will leave no color or streak behind. It may even scratch the tile. If the stone leaves a colored mark on the tile, it is likely to be another type of substance. The absence of a streak isn’t definitive confirmation that the ruby is genuine, but the presence of color does confirm that it isn’t real.