My birthday is also in sept and my birthstone has always been sapphire. I have also done well with aquamarine.... and of course amethyst....
But I looked up your crystal astrology.... without your time of birth.... not sure if it will change the info that much but here is what Marina has:
Sun Sabian Symbol: A ouija board. Acumen
17°01' Virgo Crystal: Golden Beryl
Moon Sabian Symbol: Two awards for bravery in war. Recognition
22°46' Capricorn Crystal: Bloodstone (Heliotrope)
Mercury Sabian Symbol: A noon siesta. Recuperation
13°47' Libra Crystal: Green Apophyllite
Venus Sabian Symbol: A house-raising. Helpfulness
2°58' Scorpio Crystal: Aegirine-Augite
Mars Sabian Symbol: A Chinese woman nursing a baby with a message. Materialization
11°46' Cancer Crystal: Chinese Writing Stone (Porphyrite)
Jupiter Sabian Symbol: A cross lying on rocks. Conscience
6°20' Pisces Crystal: Staurolite
Saturn Sabian Symbol: A performer of a mystery play. Subtlety
5°33' Aquarius Crystal: White/Clear Topaz
Uranus Sabian Symbol: A large white cross upraised. Glorification
1°55' Virgo Crystal: White Gold
Neptune Sabian Symbol: An embassy ball. Display
11°18' Scorpio Crystal: Blue Diamond
Pluto Sabian Symbol: A boy molded in his mother's aspiration for him. Exaction
10°07' Virgo Crystal: Cluster Quartz Crystal
North Node Sabian Symbol: The constellations in the sky. Surety
6°39' Leo Crystal: Star Sapphire
South Node Sabian Symbol: A child born of an eggshell. Essentiality
6°39' Aquarius Crystal: Septarian (Dragonstone)
Here is the link
http://www.crystalastrology.com/natal.php
BTW I have the book if you want to borrow it.