Table:
text: Birthstones
Birthstones by cultures
Birthstones by cultures
Month_ _15th_20th_century U_S_1912 U_S_2013 Britain_2013 Hindu
September chrysolite sapphire sapphire sapphire , lapis lazuli zircon
October opal , aquamarine opal , tourmaline opal , tourmaline opal coral
November topaz , pearl topaz topaz , citrine topaz , citrine cat`s-eye
December heliotrope , ruby turquoise , lapis lazuli turquoise , zircon , tanzanite tanzanite , turquoise topaz

Question: When the US used sapphire in 1912, what was the Hindu birthstone?