DOI: 10.5281/zenodo.18703781
title: East Asian Prehistoric Human-Face Jade Form 13 (EANJ_FACE_13):
High-Resolution Digital Documentation of Morphology, Perforations, Surface Evolution, and Tool Traces

description: 1. Core Statement

1.1 This record contains high-resolution original visual data of a jade object in the form of a human face (Form ID: EANJ_FACE_13).

1.2 As a foundational research layer within the digital archiving initiative for this specimen, the dataset provides high-fidelity visual evidence intended to support morphological analysis, traceological observation, and materials science–related research.

1.3 The digital documentation of this object forms part of a continuously expanding dataset designed to provide citable baseline material for future cross-object comparative studies. At the present stage, no cross-sample comparative interpretations are undertaken.

 

2. Access and Use Conditions

2.1 Access Restrictions

For reasons of data security and academic compliance, the high-resolution original files of this dataset are subject to restricted access.

2.2 Application Requirements

Applicants are required to submit a clear statement of research purpose and institutional affiliation through the Zenodo platform.

2.3 Use Limitations

This dataset is restricted to academic research, visual documentation, and comparative analysis.Any commercial use, non-academic dissemination, or reproduction beyond scholarly comparative purposes is strictly prohibited without explicit authorization from the dataset publisher.

 

3. Dataset Composition

3.1 Overview Documentation

High-resolution photographs of the front and reverse, recording the overall proportions and geometric structure of the object.

3.2 Metric Reference

Images including a metric scale for quantitative reference.



Length: 5.0 cm

Width: 7.2 cm

Thickness: 1.2 cm

Weight: 60 g


3.3 Microscopic Evidence

High-magnification macro images documenting perforation morphology, micro-weathering features, and observable processing-related surface traces.

 

4. List of Object Images

The dataset includes the following high-resolution images:



Front view: Records facial configuration and overall proportionsEANJ_FACE_13_FRONT

Reverse view: Shows the rear contourEANJ_FACE_13_REVERSE

Scale view: Includes a metric scale for dimensional referenceEANJ_FACE_13_WITH_SCALE

Front macro view: Documents surface traces on the right facial sideEANJ_FACE_13_MIC_FRONT_WEAR_A

Front macro view: Documents surface traces on the left facial sideEANJ_FACE_13_MIC_FRONT_WEAR_B

Front macro view: Documents perforation morphologyEANJ_FACE_13_MIC_UNIF_A_FRONT

Front macro view: Documents perforation morphologyEANJ_FACE_13_MIC_UNIF_B_FRONT

Reverse macro view: Documents reverse-side perforation morphologyEANJ_FACE_13_MIC_UNIF_B_REVERSE


 

5. Observed Morphological Features

5.1

The object presents a horizontally extended, flattened “dual-unit” configuration, composed of two near-circular forms joined at a central axis.At the junction, the overall outline constricts inward, forming a distinct concave notch.

5.2 Facial Contours and Delimitation

Central Axis Feature:At the upper portion of the junction between the two circular units, a circular through-perforation is present.

Forehead Features:Along the upper edges of both connected units, a series of short, parallel vertical incised lines is observable.

5.3 Facial Features (Symmetrically Distributed Across Both Faces)

Eyes:On both faces, the eyes are expressed by almond-shaped incised outlines, each containing a horizontal medial dividing line.

Nose and Mouth:The nose appears as a triangular-like raised form, while the mouth is expressed using a morphological treatment similar to that of the eyes.

5.4 Surface Texture and Cracking

Network Cracking:The entire surface of the object is covered with reddish-brown network-like cracking. These cracks appear more continuous on the reverse side, forming irregular geometric mesh patterns.

Coloration and Deposits:The base material ranges visually from pale yellow to dark brown. Within the cracks, concentrated dark brown material is visible, suggesting infiltration influenced by environmental factors.

5.5 Reverse Features

The reverse surface appears evenly ground and flattened. No additional intentionally formed decorative surface features are observed.

5.6

All descriptions above are strictly limited to morphological and structural features directly observable in the images and do not involve any interpretation regarding manufacturing techniques, function, chronology, or cultural attribution.

 

6. Limitations, Observational Constraints, and Open Questions

6.1 Observational Constraints

Obscuration of Surface Traces by Cracking:The extensive network cracking intersects visually with incised surface features, increasing the difficulty of identifying finer processing-related traces, such as striation orientation at the base of incised lines.

Internal Details of the Central Perforation:Deposits adhering to the inner walls of the perforation partially obscure internal surface details, limiting comprehensive observation.

6.2 Open Questions

Stress Relationships in the Joined Structure:Cracks appear to extend in specific directions around the central junction. Further analysis is required to assess how this morphology may influence material strength during long-term preservation.

Consistency of Incised Line Depth:Whether measurable differences exist in the depth and slope of incised facial features between the two faces, potentially indicating variation in execution, remains to be examined.

Mineralogical Composition of Surface Deposits:The reddish-brown material concentrated within cracks may derive from environmental infiltration or represent residual material of a different origin; further testing is required.

Dual-Face Visual Logic:Whether this connected human-face configuration represents a marginal or infrequently documented case within comparable recorded forms remains an open question.

 

7. Imaging and Processing

7.1 All images were captured using a full-frame camera equipped with a 90 mm macro lens in RAW format and subsequently converted to JPEG files (approximately 42 megapixels per image), with no localized retouching applied.

7.2 Photography was conducted under controlled lighting conditions using a neutral background to minimize environmental interference.

7.3 No physical handling or surface intervention was performed on the object during image acquisition.

7.4 Post-processing, where applied, was limited to global exposure and white balance adjustments to ensure accurate visual representation of the material condition.

 

8. Compliance and Due Diligence

8.1 The compilation and release of this dataset adhere to fundamental principles of academic data management.

8.2 Prior to digitization and publication, the dataset underwent internal review addressing publication risk, usage boundaries, and alignment with academic norms, ensuring a transparent, cautious, and procedurally sound process.

8.3 This dataset is published solely as a non-interpretive record of original visual data and does not constitute any academic conclusions, cultural attributions, chronological determinations, or institutional positions.