Seals and sealings

The seals and sealings of the Indus Valley Civilization (IVC) represent a pinnacle of proto-historic craftsmanship, administration, and artistic expression. Dating primarily from the Mature Harappan phase (c. 2600 BCE to 1900 BCE), these artifacts serve as primary source material for reconstructing the socio-economic, religious, and administrative lives of the Harappan people. While seals are the physical matrices used to make impressions, sealings are the actual clay impressions left on packages, vessels, or documents.

Geographical Distribution and Core Material Composition

Key Discovery Sites

Harappan seals have been excavated across the length and breadth of the civilization. The largest assemblages come from major urban centers such as Mohenjo-daro, Harappa, Lothal, Kalibangan, Chanhudaro, and Dholavira. Notably, Harappan seals have also been discovered outside the subcontinent—in Mesopotamian sites like Ur, Kish, and Susa, and in the Persian Gulf (Failaka and Bahrain)—proving robust international maritime and overland trade networks.

Material Matrix

The vast majority of Harappan seals were crafted from steatite (soapstone), a soft silicate mineral that was easily carved and subsequently baked at high temperatures to harden into a durable white substance. However, the Harappans also utilized a diverse range of alternative materials depending on regional availability and status.

Distribution of Materials Used for Seals

• Steatite (Soapstone): Most common material; accounts for over 90% of discovered seals.
• Faience: A vitreous paste made of crushed quartz, colored with glaze; used for smaller seals.
• Terracotta: Baked clay; commonly found at lower-income residential sectors and provincial sites like Kalibangan.
• Agate and Chert: Semi-precious hardstones requiring advanced lapidary skills.
• Copper and Bronze: Metallic seals, highly durable, frequently found at Mohenjo-daro and Lothal.
• Ivory: Rare and luxury material, indicating high-status ownership.

Typology, Physical Dimensions, and Shapes

Standard Shapes

The most ubiquitous shape is the square seal, typically measuring between 2 × 2 centimeters to 3 × 3 centimeters. Rectangular seals are the second most common variety. Less frequent geometric variants include circular, cylindrical, triangular, and cubical seals.

Structural Features

Square seals typically feature a perforated boss (a raised knob) on the reverse side. This hole allowed a cord to be threaded through, enabling the owner to carry the seal around the neck or wrist. Rectangular seals, by contrast, are often flat and contain an inscription on one side without an animal motif or a reverse boss. Cylindrical seals found in the IVC often exhibit West Asian iconographic influences, indicating direct cultural contact with Mesopotamia.

Iconography: Animal Motifs and Religious Imagery

The obverse side of the typical Harappan square seal features a combination of a realistic or mythical animal motif and a line of script.

The Unicorn Motif

The single-horned mythical beast, frequently referred to as the “unicorn,” is the most dominant animal motif, appearing on over 60% of all carved seals. It is almost invariably depicted facing a two-tiered object identified by archaeologists as a ritual “sacred manger” or a “filtering apparatus.”

Other Zoomorphic Representations

• Humped Zebu Bull: Depicted with remarkable anatomical precision, showcasing pronounced humps and heavy dewlaps.
• Elephant and Rhinoceros: Frequently depicted, indicating a much more humid and forested climate in the Indus region during the third millennium BCE than exists today.
• Tiger and Water Buffalo: Captured in dynamic postures, often associated with wilderness motifs.
• Composite Beasts: Mythical creatures combining human, bovine, and feline body parts, indicating complex mythological beliefs.
• Absence of the Horse: Notably, the horse is entirely absent from the iconographic repertoire of Harappan seals.

Narrative and Religious Seals

A distinct subset of seals depicts complex mythological and religious scenes rather than standalone animals.

Key Narrative Seals and Interpretations

• The Pashupati Seal (Mohenjo-daro): Depicts a three-faced seated deity in a yogic posture (Padmasana), wearing a horned headdress. The figure is surrounded by four wild animals: an elephant, a tiger, a rhinoceros, and a water buffalo, with two antelopes or ibexes depicted beneath the throne. Sir John Marshall identified this as a proto-Shiva figure.
• The Tree Deity / Tiger Seal: Features a deity nestled within the forks of a sacred Pipal tree (Ficus religiosa), with a worshipper kneeling before it, a human-headed goat, and a row of seven figures (often interpreted as sapta-rishis or celestial maidens) at the bottom.
• Gilgamesh Motif: Seals showing a heroic human figure wrestling two tigers simultaneously, drawing direct parallels with the Mesopotamian Epic of Gilgamesh and signifying trans-regional cultural exchanges.

The Harappan Script on Seals

Linguistic Characteristics

The upper portion of the seals typically contains a line of the undeciphered Harappan script. The script is logo-syllabic, where each sign represents a word or a syllable. The corpus consists of approximately 400 to 450 distinct signs.

Direction of Writing

The script was written from right to left. Archaeologists confirmed this by observing the cramping of signs on the left margin of seals, proving that the scribe ran out of space as they neared the left edge. When a text spans multiple lines, it occasionally follows the boustrophedon method (writing alternating lines from right to left, then left to right).

Average Length of Inscriptions

The inscriptions are remarkably brief. The average inscription contains about five signs, and the longest continuous inscription on a single object (found at Mohenjo-daro) contains 26 signs. This brevity indicates that the text likely denotes proper names, official titles, professional guilds, or administrative departments rather than narrative literature.

Socio-Economic and Administrative Functions

Commercial Authentication

Seals were the bedrock of the Harappan long-distance trade network. When merchant guilds shipped goods in bags, bales, or ceramic jars, the mouth of the container was tied with twine. A layer of wet clay was applied over the knot, and a seal was pressed into it. Once dry, this “sealing” secured the contents. If the sealing arrived intact at destinations like Ur or Lothal, it guaranteed that the goods had not been tampered with.

Ownership and Social Stratification

Seals functioned as personal identity cards, official signatures, and markers of socio-economic status. The variation in materials—from premium ivory and steatite to common terracotta—reflects a highly stratified society where elites, state officials, and wealthy merchants held distinct, identifiable markers of authority.

Amuletic and Protective Value

Many seals show signs of heavy wear along the edges, and their discovery in domestic burial contexts suggests they were carried as protective amulets to ward off evil spirits or invoke the protection of specific deities, such as the horned deity or the tiger-slayer.

Comparative Matrix: Seals vs. Sealings

Key Archaeological Insights and Trivia for Civil Services

• Lothal Sealing Assemblage: The dockyard city of Lothal yielded a burnt storehouse containing dozens of clay sealings that had been baked inadvertently during a ancient fire. These sealings retain the impressions of packing materials like reeds, hemp ropes, and woven mats on their reverse sides, providing direct physical evidence of how goods were packaged for export.
• The Signboard of Dholavira: While not a seal, the large-scale inscription found at Dholavira utilizes ten oversized signs identical in form to those found on standard steatite seals, indicating that seal symbols were scaled up for public administrative announcements.
• Chanhudaro Bead Factory and Seal Workshop: Chanhudaro has been identified as a specialized manufacturing hub. Excavations there revealed unfinished steatite seals, bronze burins, and metallic saws, providing step-by-step evidence of the seal-carving technological chain (chaîne opératoire).