This premium marketing data with optional opt-in email addresses is comprised of active private investors and qualified prospective buyers who have inquired about investment-grade diamonds or precious gemstones, as well as current buyers and traders of rough or polished diamonds and gemstones.  All marketing data points, self-reported and public, are audited and double verified each month through 2 or more organic sources ensuring superior accuracy and a receptive and responsive audience.  Within the last 12 months, the affluent audience of this mailing list has invested or traded at least $10,000 in investment-grade diamonds or precious gemstones, or they have inquired into making an investment.