Heart scarab

The heart scarab is an oval scarab artifact dating from ancient Egypt. Mostly an amulet, it was also used as jewelry, a memorializing artifact, or a grave good. The heart scarab was used by referring to Chapter 30 from the Book of the Dead and the weighing of the heart, being balanced by Maat, goddess of truth, justice, order, wisdom, and cosmic balance. The function of the heart scarab was to bind the heart to silence while it was being weighed in the underworld to ensure that the heart did not bear false witness against the deceased. As in many current religions, the individual had to show 'worthiness' to achieve the afterlife. The heart was extremely important to ancient Egyptians as the seat of intelligence and the storehouse of memory. It was the only organ left in place during mummification. Heart scarab amulets were meant as substitutes for the heart should the deceased be deprived of the organ in the afterlife. For example, when a person died, a heart scarab was often placed on their heart and bound underneath the bandages of the mummy. This was to ensure that it could not be physically removed from their person.
The amulets are described in the Book of the Dead to be made (per Andrews, Amulets of Ancient Egypt) of a stone: nmhf, nemehef (not now identified); typically green stones, green jasper, serpentine, and basalt. Andrews continues to say they are in fact made from: green or dark-green materials, such as glazed steatite, schist, feldspar, hematite and obsidian; also blue-glazed composition (faience), Egyptian blue, rock crystal, alabaster or red jasper. Instead of the head of a scarab, heart scarabs had the head of a human and were often inscribed with chapter 30B of the Book of Going Forth by Day. Heart scarabs were also used in the design of pectorals, which were a rectangular chest ornament.
The alternate heart amulet itself represents similar ideas, but is made in the form of the heart as used by the Egyptian-language hieroglyph.
The first known depiction of the heart amulet is found in the 16th or 17th Dynasty circa 1690 B.C., although it is known that the amulet was in use as early as the 11th Dynasty. Until the beginning of the 18th Dynasty, the heart scarab had a strong connection to Theban royalty. During the 21st Dynasty, it stood as an important item of magical protection among the priesthood of Amun. After the 21st Dynasty, the amulet is rarely depicted in human contexts and is instead associated with specific divinities.
Heart scarabs went through significant modifications in their design over the course of history. For example, during the New Kingdom, heart scarabs were large, typically between four and five centimeters long. Then, in the Third Intermediate Period, a new variation of the heart scarab emerged. This new scarab was much smaller, at about two to four centimeters long. Due to their smaller size, these heart scarabs were not engraved. Unlike other heart scarabs that were placed directly above a person's heart and wrapped into their bandages, these new variations of heart scarabs were actually placed inside the person's chest cavity, alongside their true heart.
Besides the personal use of the amulet in life, the body was often provided with amulets in burial, with more amulets implying more protection. The most common funerary amulets were the heart scarab, Wadjet Eye, Djed Pillar amulet, Wadj amulet, Tyet amulet, and the Golden-vulture collar, (for goddess Mut). Amulet usage changed greatly over the millenniums of ancient Egypt.
The papyrus stem,
or Wadj amulet was made from 'green feldspar' as prescribed in Chapter 160, Chapter 159 from the Book of the Dead. The most common explanation for the amulet is that it provided 'eternal youth' to the deceased.