All gems associated with the moon partook of its enigmatic character. Illuminating the witching hour of the night, when malevolent and treacherous spirits were supposed to hold sway, the moon was sometimes regarded as baleful, as may be seen in the idea that associated lunacy with exposure to the bright rays of the moon; at other times it was supposed to have the power to conjure these evil influences and to drive off the powers of darkness. The symbolical significance of the colors of precious stones is treated at considerable length by Giacinto Gimma,[13] who has gathered together a great quantity of material on the subject. Yellow worn by a man denoted secrecy, and was appropriate for the silent lover; worn by a woman it indicated generosity. Golden yellow was, of course, the symbol of the sun and of Sunday. The precious stone was the chrysolite or the yellow jacinth. The animal connected with the color was the lion, doubtless, from the association of the zodiacal sign Leo with the midsummer sun. Of the seven ages of man yellow typified adolescence. Roman matrons covered their heads with a yellow veil to show their hope of offspring and happiness. Because garments of this color were a sign of grandeur and nobility, a golden vestment is assigned to the Queen of Heaven as a sign of her pre-eminence, as we read in Psalm xlv, 9: “Upon thy right hand did stand the queen in gold of Ophir.” Gimma’s explanation of this as referring to the Virgin Mary is in accord with the Catholic exegesis of his time. White signified for men friendship, religion, integrity; for women, contemplation, affability, and purity. It was associated with the moon and with Monday and was represented by the pearl. The animal having an affinity with white was quite naturally the ermine. The mystic number was seven, and white was the color of infancy. Among the ancients white was a sign of mourning and sadness, and the Greek matrons attired themselves in white on the death of their husbands. Gimma states that in his time, in Rome, widows used to wear white as mourning for their husbands, while throughout Italy a white band worn around the head was a sign of widowhood.