About us

Gem Decor® is a NMG - Norcross Madagascar Group brand.
In the mineral trade, we have been a leading supplier of gem rough and polished products. Hundreds of tons per year are sold to jewelry manufacturers around the world.

Norcross Madagascar Group etablished in 1991, owns and operates more than 15 gemstone mines in Madagascar.

Rough materials are transformed in the NMG facilities in Antananarivo and shipped arround the world, mainly in the US.

Products and materials are also stocked, exibited and disctributed from our Warehouse, Galleries and Showroom located in Tucson, AZ.

Madagascar Facilities

If you have a chance to visit Madagascar, we'd welcome you to our facilities in Antananarivo, were we store and manufacture our products.

Map location

Our Quarries

We own and operate these quarries in Madagascar: Agate, Amazonite, Apatite, Blue Calcite, Carnelian, Crocodile Jasper, Desert Jasper, Fire Quartz, Girasol, Hematite, Indigo Gabbro, Labradorite, Optical Calcite, Petrified Wood, Quartz, Rose Quartz, Sea Jasper, Yellow Jasper, Zebradorite... Pictured is our Labradorite Quarry.


Norcross Madagascar Group (NMG) provides school structures to the nearby community close to their quarries, as these structures are crucial for the isolated areas. Pictured is one of the school buildings near the NMG quarry in the South of Madagascar.