Diamond Eight Hearts and Eight Arrows

Hearts and Arrows Pattern

Under specific optical imaging equipment conditions, when viewing vertically along the central axis through the diamond's table, distinct optical patterns emerge: heart-shaped patterns are visible from the pavilion side, while radial arrow-shaped patterns appear from the table side.

1. Eight Hearts and Eight Arrows Pattern
A hearts and arrows pattern displaying eight heart-shaped and eight arrow-shaped images.

2. Octagonal Star
In the eight hearts and arrows pattern, an octagonal star appears at the center of the table.

3. Lower V-Shapes
When the diamond exhibits the eight hearts and arrows pattern, eight "V"-shaped patterns are visible between the hearts and the central point (culet) from the pavilion side.

Grading of Eight Hearts and Eight Arrows Effect
Based on clarity contrast, shape integrity, image consistency, brightness/darkness balance, and considering factors such as diamond color, clarity, and cut, the eight hearts and eight arrows effect is classified into four levels:

l "IDEAL H&A" (Extremely Perfect)

l "EX H&A" (Perfect)

l "VG H&A" (Good)

l Non-Complete Eight Hearts and Eight Arrows Effect

01 Extremely Perfect Eight Hearts and Eight Arrows Effect (IDEAL H&A)

1. Eight hearts are clear, with consistent shape, size, and symmetry. Heart shoulders are flat and evenly wide.

2. Lower V-shapes have moderate openings, symmetrically distanced from hearts, with balanced proportions.

3. Eight arrows are clear, uniform in shape and size. The central circle formed by the octagonal star's vertices occupies ~1/3 of the table width. Shafts align without deviation.

4. The octagonal star maintains uniform symmetry and central alignment.

5. No noticeable color or brightness differences in hearts/arrows.

6. No color grade restriction.

7. Internal/external features must not disrupt the pattern.

8. Cut proportions, symmetry, and polish must meet GB/T 16554 EX grade.

02 Perfect Eight Hearts and Eight Arrows Effect (EX H&A)

1. Same criteria as IDEAL H&A for hearts, V-shapes, arrows, and octagonal star symmetry.

2. Measurable symmetry must meet GB/T 16554 EX grade; cut proportions, symmetry, and polish must meet VG grade.

03 Good Eight Hearts and Eight Arrows Effect (VG H&A)

1. Hearts are visible but show observable variations in shape, size, symmetry, or brightness.

2. Lower V-shapes show noticeable symmetry differences.

3. Arrows are visible but show observable variations.

4. Octagonal star displays visible size/symmetry variations.

5. Minor internal/external features allowed if they do not disrupt heart/arrow outlines.

6. Cut must meet GB/T 16554 VG or higher.

04 Non-Complete Eight Hearts and Eight Arrows Effect

1. Missing or irregular heart patterns.

2. Blurred or inconsistent V-shapes/heart boundaries.

3. Missing arrows, irregular arrow patterns, or incomplete shafts/heads.

4. No discernible star pattern.

5. Internal/external features disrupt heart/arrow integrity.

6. No cut grade restrictions.