What is Your Birthstone and What is its Meaning?

<form> <div align="center"> <table border="0" cellspacing="0" cellpadding="3" bgcolor="#D0DBD1"> <tr style="font-family:arial; font-weight:bold; font-size:10px;"> <td>I was born in:</td> <td><select onchange="this.form.birthstone.value=this.options[this.selectedIndex].value"> <option value="">Select month...</option> <option value="Garnet">January</option> <option value="Amethyst">February</option> <option value="Aquamarine">March</option> <option value="Diamond">April</option> <option value="Emerald">May</option> <option value="Pearl">June</option> <option value="Ruby">July</option> <option value="Peridot">August</option> <option value="Sapphire">September</option> <option value="Opal">October</option> <option value="Citrine">November</option> <option value="Turquoise">December</option> </select></td> <td>My birthstone is:</td> <td><input type="text" name="birthstone" style="font-weight:normal;" readonly></td> </tr> <tr> <td colspan="2"><a href="http://www.stonehinged.com/gemstone_meanings.html" target="_blank" style="font-family:arial; font-weight:normal; font-size:9px;">Stones and their meanings</a></td> <td colspan="2" align="right" style="font-family:arial; font-weight:normal; font-size:9px;">brought to you by <a href="http://www.stonehinged.com/" target="_blank" style="font-family:arial; font-weight:normal; font-size:9px;">Stonehinged.com</a></td> </tr> </table> </form>