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Brief Description: Its name derives from the Persian word lazhward, lazhuward = blue. Its chemical formula is Cu3(CO3)2(OH)2 and it belongs to the category carbonate minerals. It is transparent to semitransparent, with glassy, pearly lustre and sky-like colour, dark to light blue. It has hardness 3½ - 4 and specific gravity 3.7 ? 3.8. Crystal system: monoclinic. The crystals are tabular, prismatic and often disfigured. It is often found in spherical, botryose and stalactite-like aggregates with spoke, fibrous assembly. It ferments with sparse hydrochloric acid. It alters into malachite (pseudomorphs of malachite by azurite). It is a secondary mineral, which occurs in oxidized parts of copper veins with malachite, chrysocolla, cuprite, copper, iron oxides, calcite etc. 
Bibliography: Ευρετήριο ορυκτών ΑΠΘ στην ιστοσελίδα http://www.geo.auth.gr/106/az_gr.htm Τσιραμπίδης Α. (2005). Ο ορυκτός πλούτος της Ελλάδας. Εκδόσεις Γιαχούδη Θεσσαλονίκη, σελ. 391. Berry, L.G., Mason, B. and Dietrich, R.V. (1983). Mineralogy. W. H. Freeman and Company, San Francisco, 561 pp. Σαπουντζής, Η. και Χριστοφίδης, Γ. (1985). Ορυκτοδιαγνωστική. University Studio Press, Θεσσαλονίκη, 241 σ.