Kimberlite garnets rich in chromium, are generally absent from most other igneous rocks, making them particularly useful as indicators for kimberlites. These indicator minerals are generally sought in stream sediments in modern alluvial material. Their presence may indicate the presence of a kimberlite within the erosional watershed that produced the alluvium. The geochemistry of Kimberlites is defined by the following parameters: Kimberlites are the most important source of primary diamonds. Many kimberlite pipes also produce rich alluvial or eluvial diamond placer deposits. About 6,400 kimberlite pipes have been discovered in the world, of those about 900 have been classified as diamondiferous,
Charlotte Sometimes (novel) Charlotte Sometimes (novel) Charlotte Sometimes is a children's novel by the English writer Penelope Farmer, published in 1969 by Chatto & Windus in the UK, and by Harcourt in the United States. It is the third and best known of three books featuring the Makepeace sisters, Charlotte and Emma. The three are sometimes known as the "Aviary Hall" books. "Charlotte Sometimes" inspired the song of the same name by the English rock band, The Cure. The story centres on a girl called Charlotte, who not long after starting at a boarding school, finds she has travelled mysteriously back more than