Plate Ring Four Finger (Terrestrial Surfaced, 4mm, DA+GRAN) from Parts of Four. DA:DIRTY STERLING. Sterling silver, dipped in acid to create a subdued surface. Results will never be identical, and this nuance / variation should be seen as a characteristic of the uniqueness of the product. GRAN:GRANDIDIERITE. Grandidierite is a rare mineral and gem that was first discovered in 1902 in southern Madagascar. Dimensions: Ring Face/Top (WxL): 4 mm × 78 mm Weight: 43 grams (size M) Composition: Acid treated sterling silver + Grandidierites Made in Bali SKU: 1314-4-DA+GRAN