As early as the first Theban Dynasty, the XIIth Egyptian (2466-2266 B.C.,) the Dynasty in which lived the Amen-em-hats and the Usertsens, the great early art period of the Egyptian empire,[26] the Egyptians engraved on amethyst, jasper and rock crystal, and at that early period did some of the most beautiful work remaining to us of their glyptography. The signets however were not always in scarab form, they were sometimes squares or parallelograms.[27] There is now in the Museum of the Louvre in Paris, France, the finest old cameo in the world. It is of the reign of Amen-em-hat IIIrd of the XIIth Dynasty, (2300 B.C.) This was the first Theban Dynasty and is a very rare period for Egyptian cameo work, as they then usually incised their engraving on precious stones and did not engrave them in relief.[28] The stone is a square sardonyx and is engraved in relief, with great fineness on one side, with a figure the name of which can be read _Ha-ro-bes_, the other side is incised and has the figure of a pharaoh killing a prisoner, whom he holds by the beard, with a mace; the cartouch reads, _Ra-en-ma_, i.e., Amen-em-hat IIIrd. The intaglio work on this side is not equal to that in cameo, on the other. There is yet in existence the signet ring of the celebrated Queen Hatshepsu (_circa_ 1600-1566 B.C.) It is made of fine turquoise, cut in the form of a scarab, perforated longitudinally and hung on a swivel. On the under side is engraved the family name of the Queen.[29] There also exists the signet ring of Amen-hotep IInd, (1566-1533 B.C.,) having inserted in it a fine green glazed scarab.[30] The description of the working and engraving of precious stones in the VIIth century before our era, is given in Ezekiel[31] where addressing the king of Tyre, he says: "Thou art covered with precious stones of all kinds, with the ruby, emerald, diamond, hyacinth, onyx, jasper, sapphire, carbuncle, sardonyx and gold. _The wheels and drills of the lapidaries_, were prepared in thy service for the day in which thou wert created." The use of the signet ring is frequently mentioned in the Old Testament.[32] There, are also the phrases, "Sealed up in a bag;"[33] "A book that is sealed;"[34] "Written evidence sealed;"[35] "Sealed with clay;"[36] "Sealing with the signet of the king."[37] There are also many places referring to the use of seals in the New Testament. In Genesis, we find Thamar asking from Judah, his seal, seal string and staff; in pledge.[38] In the same book, but referring to a much later period,[39] Pharaoh takes his signet ring, in which was likely set a scarab, from his hand and puts it on the hand of Joseph, so as to confer sovereign authority upon him.[40]