Error-barred Black Diamond Symbol
The ⧱ symbol is a black diamond with an error-bar style mark, commonly used as a visual math indicator.
U+29F1
⧱ is a mathematical symbol from the “ERROR-BARRED BLACK DIAMOND” unicode set. You can copy it directly or use standard escapes in HTML, CSS, and JavaScript.
Error-barred Black Diamond Symbol Meaning
“Error-barred black diamond” (U+29F1) is a glyph used as a compact marker that visually suggests uncertainty, measurement variation, or an error-style annotation. In practice, it’s most helpful when you want a dense symbol that reads like a data-point indicator combined with an error-related cue. Designers and writers sometimes use it in text to represent statistics, graphs, calibration notes, or annotated values where a special character is preferable to plain text words. Because it’s a single Unicode character, it’s also convenient for labels, legend entries, and consistent iconography in documents and interfaces.
Common uses
- •Annotating values with uncertainty in math or science notes
- •Creating compact legend markers for chart callouts
- •Designing typographic bullets or callouts for measurement-related text
- •Labeling uncertainty/error points in diagrams or infographics
- •Using as a special character marker in technical documentation
Examples
⧱ Error-barred black diamond
- ⧱Measured value ⧱ 12.4 (uncertainty noted).
- ⧱Data point ⧱ appears at the highlighted error range.
- ⧱Legend: mean ⧱, median —, outlier ▲.
- ⧱Calibration record shows ⧱ for repeated trials.
- ⧱In the figure, ⧱ marks the uncertain measurement.
Variations
Ready to copy
Technical codes
| Unicode | U+29F1 | |
| HTML Entity | ⧱ | |
| HTML Code | ⧱ | |
| CSS | \29F1 | |
| Alt Code | Alt + 10737 | |
| Decimal | 10737 |
How to type Error-barred Black Diamond Symbol (⧱)
On Windows
Hold Alt and type 10737 on the numeric keypad. In Word, type 29F1 then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 29F1. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 29f1, then press Enter or Space.
Anywhere
Copy ⧱ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does the Error-barred Black Diamond symbol mean?
“Error-barred black diamond” (U+29F1) is a glyph used as a compact marker that visually suggests uncertainty, measurement variation, or an error-style annotation. In practice, it’s most helpful when you want a dense symbol that reads like a data-point indicator combined with an error-related cue. Designers and writers sometimes use it in text to represent statistics, graphs, calibration notes, or annotated values where a special character is preferable to plain text words. Because it’s a single Unicode character, it’s also convenient for labels, legend entries, and consistent iconography in documents and interfaces.
What is the Unicode character for ⧱?
⧱ is Unicode U+29F1, named “ERROR-BARRED BLACK DIAMOND”.
How can I copy ⧱ into HTML?
Use the HTML entity: ⧱.
What are the CSS and JavaScript escapes for this symbol?
CSS escape: \\29F1. JavaScript (code point) escape: \\u{29F1}.
Is ⧱ only for math, or can it be used in general typography?
It’s mainly used as a technical/math marker, but it can also work as a compact uncertainty-style callout or special character bullet in any design context.