We have found that a minimum batch will weigh about 10 grams - the Rubies are way bigger than the Sapphires or other stones. We can add as many 10 gram batches of Gemstones to your paydirt shipment as you like - although supplies are limited.
Not sold separately - must be added to a paydirt shipment purchase.
The Gemstone mix may contains Garnets, Citrine, Tourmaline, Rubies, Sapphires, and/or Tanzanite...and now Opals!
While not a gemstone, we occasionally include Bismuth, a fascinating metal, and even some tumbled/faceted stones.