MR96AL4: Group of sharp rhombohedral Calcite crystals with flattened lenticular habit and rich in inclusions, probably argillaceous, brown in color. Good size and quality for the locality.
Marble quarries, Estremoz, Évora District, Alentejo Central Province, Alentejo Region  Portugal (07/2008)

Specimen size: 12.3 × 11.7 × 4.4 cm = 4.84” × 4.61” × 1.73”

Main crystal size: 6.7 × 4.6 cm = 2.64” × 1.81”