A colorful bright sparkling thumbnail from the classic English locale of Boulby. The Boracite is in two generations and two colors, the later is gem clear blue crystals resting on the earlier green. The rare mineral Hilgardite is in bright orange crystals in singles and clusters. By far the worlds best Hilgardite comes from this mine and these are fine crystals for the specie. Many nice display angles on this one, in excellent condition and reasonably priced.