Editor’s Note
This article highlights the launch of a new wholesale collection of salt-and-pepper sapphires from Tanzania, drawing a parallel to the distinctive inclusions seen in salt-and-pepper diamonds.

Bangkok—Navneet Gems & Minerals has launched a wholesale collection of salt-and-pepper sapphires from the Songea region in Tanzania.
The sapphires’ color distinction comes from visible inclusions in the stone, similar to salt-and-pepper diamonds.
They are sourced globally with notable deposits in Australia and Sri Lanka, said the Thailand-based manufacturer, but those from Tanzania have a similar color profile to Montana sapphires and a clear black inclusion from hematite minerals inside the gem.
The manufacturers’ offering is comprised of 100 to 150 singles stones, both calibrated and fancy shapes.
The gemstones range between 0.5 and 2 carats and are available in commercial and finer qualities. They come in various colors including yellow, green, and teal.
Agarwal sees the inclusions as unique characteristics of the stone, rather than undesirable flaws, citing copper inclusions seen in some Brazilian Paraíba tourmalines and zircon crystals that can appear in Sri Lankan spinel.
The manufacturer said it seeks to utilize all qualities of gemstones from a deposit.
The increasing value of ethical sourcing to modern buyers is generating an appreciation for previously overlooked gemstone variants and a shift in the conventional valuation of gemstones, said Navneet Gems & Minerals.
The company said maintaining consistent supply in Tanzania has been a challenge in the past, but it has material for now.
Tanzania, with its active government participation in promoting sustainability in its gemstone industry, has potential to establish an ethical mine-to-market chain, according to Navneet Gems.
The company said it is also “committed to addressing the challenge of reporting the full chain of custody, anticipating a rising demand for this transparency feature.”
Founded by Suresh Agarwal in 1993, Navneet Gems & Minerals is led today by his son Navneet Agarwal and headquartered in Bangkok.
