DOI: 10.5281/zenodo.18714086
title: East Asian Prehistoric Human-Face Jade Form 16 (EANJ_FACE_16):
High-Resolution Digital Documentation of Morphology, Perforations, Surface Evolution, and Tool Traces

description: 1. Core Statement

1.1 This record contains high-resolution raw visual data of a jade object with a human-face form (Form ID: EANJ_FACE_16).

1.2 This dataset serves as the foundational research layer of the digital archival program for this specimen, providing high-fidelity visual evidence 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 intended to provide citable baseline material for future cross-object comparative studies. No cross-sample comparative interpretation is undertaken at the present stage.

 

2. Access and Use Conditions

2.1 Access RestrictionsFor reasons of data security and academic standards, the high-resolution original files of this dataset are subject to restricted access.

2.2 Application RequirementsApplicants are required to submit a clearly defined research purpose and institutional affiliation via the Zenodo platform.

2.3 Usage LimitationsThis dataset is limited to academic research, visual documentation, and comparative analytical use only.Any commercial use, non-academic dissemination, or reproduction beyond academic comparative purposes is strictly prohibited without explicit authorization from the dataset publisher.

 

3. Dataset Composition

3.1 Overview DocumentationHigh-resolution images of the front and reverse sides documenting the object’s overall proportions and geometric structure.

3.2 Metric ReferenceImages including a metric scale for quantitative analysis.



Length: 3.7 cm

Width: 3.8 cm

Thickness: 1.1 cm

Weight: 25 g


3.3 Microscopic EvidenceHigh-magnification macro images documenting perforation morphology, microscopic weathering features, and observable manufacturing-related traces.

 

4. Object Image Inventory

The high-resolution images included in this dataset are as follows:



Front view: documenting facial configuration and overall proportionsEANJ_FACE_16_FRONT

Reverse view: showing rear contour morphologyEANJ_FACE_16_REVERSE

Scale reference view: including a metric scale for dimensional referenceEANJ_FACE_16_WITH_SCALE

Reverse macro view: documenting right perforation morphologyEANJ_FACE_16_MIC_ONP_R

Reverse macro view: documenting left perforation morphologyEANJ_FACE_16_MIC_ONP_L

Front macro view: documenting frontal surface morphologyEANJ_FACE_16_MIC_FRONT_GP

Front macro view: documenting frontal surface morphology (detail)EANJ_FACE_16_MIC_FRONT_IM_B


 

5. Observed Morphological and Structural Features

5.1 Overall FormThe object presents a horizontally expanded, inverted triangular, flattened volume. The upper edge is broad and gently arched, with symmetrical wing-like lateral extensions projecting outward. The lower portion narrows toward a blunt, pointed termination.

5.2 Facial Motif Characteristics



Central Axial Structure:On the front surface, three shallow incised lines enclose an approximately isosceles triangular form along the central axis, with the apex oriented upward but remaining open.

Eye Zones:On either side of the central triangle are two inverted triangular motifs, corresponding approximately to eye positions. Above each inverted triangle are two parallel incised lines.

Mouth and Lower Facial Zone:In the lower third of the object, a long horizontal incised line extends across the width. Below this line, multiple short incised lines intersect diagonally, forming a grid-like pattern.


5.3 Perforation Features (Reverse Side)



Dual Perforation Structure:A pair of symmetrically distributed circular through-perforations is observable in the upper-middle area of the reverse side.

Perforation Morphology:The inner walls of the perforations exhibit multi-layered stepped spiral striation traces. Only minimal sedimentary deposits are present within the channels.


5.4 Material and Surface Condition



Color Characteristics:The object displays a relatively uniform greenish coloration. The material appears dense and exhibits a subtle oily luster.

Mineral Inclusions:Both the front and reverse surfaces show scattered pale, fibrous mineral speckling, with a relatively higher concentration toward the lower area of the reverse side.


5.5 Interpretive Boundary StatementAll descriptions above are strictly based on morphological and structural features directly observable in the images and do not involve any interpretation related to manufacturing techniques, function, chronology, or cultural attribution.

 

6. Limitations, Observational Constraints, and Open Questions

6.1 Observational Constraints



Visual Distortion of Incised Line Depth:Due to the high surface luster of the object, strong illumination may produce shadowing effects over the incised geometric lines on the front surface, making it difficult to accurately assess depth variation among individual incisions based solely on static imagery.


6.2 Open Questions



Standardization Logic of Geometric Motifs:Whether the geometric system formed by the central isosceles triangle and the flanking inverted triangles adheres to a specific proportional or symmetrical standard requires further quantitative measurement.

Spatial Intent of Lateral Wing Structures:The observed lateral protrusions are positioned noticeably higher than anatomically conventional ear locations. Whether this reflects imprecise spatial representation or a deliberate functional or decorative choice remains unclear.

Distribution of Grid-like Incisions:Compared with currently documented materials of comparable form, whether the placement of the grid-pattern incisions in this specimen reflects a more pronounced marginal positioning warrants further comparative analysis.


 

7. Imaging and Processing

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

7.2 Imaging was conducted under controlled lighting conditions with a neutral background to minimize environmental interference.

7.3 No physical treatment or surface intervention was applied to the object during the imaging process.

7.4 Any post-processing performed was limited to global exposure and white balance adjustments to accurately reflect the visual condition of the material.

 

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 due diligence assessment, including evaluation of publication risk, usage boundaries, and alignment with academic standards, to ensure transparency, caution, and procedural soundness.

8.3 This dataset is released strictly as a non-interpretive record of raw visual data and does not constitute any form of academic conclusion, cultural attribution, chronological determination, or institutional position statement.