Engagement Rings - Unique Choice of Gemstones Austin Diamond District offers a stunning collection of gemstone engagement rings including emerald, ruby, sapphire & diamond engagement rings. Call us at 512.458.4367 & order your gemstone engagement rings today! in Public bookmarkswith engagementgemstoneringsby 4 users Note: Austin Diamond District offers a stunning collection of gemstone engagement rings including emerald, ruby, sapphire & diamond engagement rings. Call us at 512.458.4367 & order your gemstone engagement rings today!