However, be very cautious with using a jeweler to clean stones; if the stone has any inclusions, cleaning with a sonic machine or steam could destroy the stone-literally breaking it into pieces, especially diamonds.
Some Palestinian youths, like Mr. Ibrahim, are purists, and they like the idea of a David-versus-Goliath battle between the clean white stones of the Palestinians and the Israeli firearms.
The appetizers (or "savoury awakenings," in Utsav menuspeak) are slight and clean: stone-seared pads of lamb (patthar ka gosht), Bengali fritters, and so on.
The industry, realizing that bad publicity could devalue a product whose only worth comes from consumer perception, is eager to certify that it sells only clean stones.
The sound of a river came from among the trees that pressed closely against the sides of the house; the river knew a way out of the forest, because it moved along sweetly and clearly, over clean stones and, unafraid, among the dark trees.
The architectural pilgrim should not tarry too long: a recent admirer closely inspecting the newly cleaned stone was politely but firmly challenged by a guard, told to move along and to appreciate the facade from across the street.
Border area between the cleaned and the not cleaned stone surface (A).
The b* values vary within a very limited interval between 7 and less than 9. Also in this case, the warmer hue of the cleaned stone material respect to the initial situation is related to the slight increase of b*.
The location of the area is indicated by the white arrow in (B). Figure 11 Characterization of the cleaned stone surface (A-B) through ESEM-EDX, and of the polished cross-section through optical microscopy (C) and ESEM (D).
