June Birthstone Alexandrite or Pearl
So for all those who are born in June, the birthstone for your month is Alexandrite. or in some places it's actually Pearl.
Discount June Birthstone
Buy June Birthstone
The reason for the difference could be old news, so I wouldn't worry about why there is more than one stone for this month. All you need do is choose which stone best suits the person you're buying the jewelry for.
Both are beautiful gemstones, both have great qualities. Pearls exude elegance and for years ladies have worn pearls in their hair and around their necks or wrists. Alexandrite, whilst relatively new in gemstone history is nontheless a beautiful red/green showing stone that will compliment any beautiful lady or handsome gentleman.