Sigilum of Amteh , Quabbalah divination tool

Literarly a sign of the truth , by John Dee very powerful scrying tool , or rather divination amplyfier
Light some purple candles and place them arround the seal

Sigillum Dei Aemeth (The sigil of Dei Ameth, Seal of the truth of God)
“Ameth” is Hebrew for “truth.” The Sigil of Ameth (or Sigillum Dei Aemeth) is best known as the large, complex circular symbol, with six pointed figures and the names of God and various angels incribed thereon. The sigil is best known in relation to the Enochian workings of Dr. John Dee, as he was instructed to re-create it by angels he contacted during his scrying sessions with Edward Kelly. (The sigil predates Dee, having first appeared in a thirteenth century grimoire; it was later expanded upon by Athanasius Kircher.) The wax disk was placed in several places on the Holy Table- beneath Kelly’s scrying stone and under each leg. The sigil would then protect the workings from outside influences.