I have a pen that you put on your shirt and it has sapphire and diamonds are they real?
They may be real or not. To tell if a diamond is real, check the diamond closely. If you see gray reflections, the diamond is more likely to be real or authentic than if you see colorful reflections. Read more at http://www.ehow.com/how_2275305_tell-diamond-real.html. To tell if sapphires are real, go to a reputable jeweler. Read more at http://www.ehow.com/how_7449164_tell-sapphires-real.html.
Look for a stamp mark on the pin to see if set in gold or white gold .Diamonds are set in precious metals.10k 14k 18k.If they it has these marks.I would go to local jeweler most will tell you no charge.Good Luck