diff --git a/docs/changelog.md b/docs/changelog.md
index e85c486f7..a6fe40342 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -39,6 +39,7 @@ As features stabilize some brief notes about them will accumulate here.
 * Fixed: `wezterm start --cwd c:/` didn't run `default_prog`. Thanks to [@exactly-one-kas](https://github.com/exactly-one-kas)! [#851](https://github.com/wez/wezterm/pull/851)
 * Improved: [skip_close_confirmation_for_processes_named](config/lua/config/skip_close_confirmation_for_processes_named.md) now includes common windows shell processes `cmd.exe`, `pwsh.exe` and `powershell.exe`. [#843](https://github.com/wez/wezterm/issues/843)
 * Fixed: don't keep the window alive after running `something & disown ; exit` [#839](https://github.com/wez/wezterm/issues/839)
+* Improved: we now draw sextant glyphs from the Unicode Symbols for Legacy Computing block (1FB00) when `custom_block_glyphs` is enabled.
 
 ### 20210502-154244-3f7122cb
 
diff --git a/test-data/blocks.py b/test-data/blocks.py
index 5338aa88a..f362afb4b 100755
--- a/test-data/blocks.py
+++ b/test-data/blocks.py
@@ -9,4 +9,13 @@ for b in range(0x2580, 0x25A0):
 print(s)
 print(s)
 print(s)
+print()
 
+s = ""
+for b in range(0x1fb00, 0x1fb3c):
+    s += chr(b) + " "
+
+print(s)
+print(s)
+print(s)
+print()
diff --git a/wezterm-font/src/lib.rs b/wezterm-font/src/lib.rs
index 02d4f4f0b..4f6050aaf 100644
--- a/wezterm-font/src/lib.rs
+++ b/wezterm-font/src/lib.rs
@@ -79,10 +79,11 @@ impl LoadedFont {
         Ok(loaded)
     }
 
-    pub fn shape<F: FnOnce() + Send + Sync + 'static>(
+    pub fn shape<F: FnOnce() + Send + Sync + 'static, FS: FnOnce(&mut Vec<char>)>(
         &self,
         text: &str,
         completion: F,
+        filter_out_synthetic: FS,
     ) -> anyhow::Result<Vec<GlyphInfo>> {
         let mut no_glyphs = vec![];
 
@@ -104,6 +105,8 @@ impl LoadedFont {
             .borrow()
             .shape(text, self.font_size, self.dpi, &mut no_glyphs);
 
+        filter_out_synthetic(&mut no_glyphs);
+
         if !no_glyphs.is_empty() {
             if let Some(font_config) = self.font_config.upgrade() {
                 font_config.schedule_fallback_resolve(
diff --git a/wezterm-gui/src/glyphcache.rs b/wezterm-gui/src/glyphcache.rs
index 9f205d182..d39493bdf 100644
--- a/wezterm-gui/src/glyphcache.rs
+++ b/wezterm-gui/src/glyphcache.rs
@@ -138,6 +138,23 @@ bitflags::bitflags! {
     }
 }
 
+bitflags::bitflags! {
+    pub struct Sextant: u8{
+        /// Upper-left
+        const ONE = 1<<1;
+        /// Upper-right
+        const TWO = 1<<2;
+        /// Middle left
+        const THREE = 1<<3;
+        /// Middle Right
+        const FOUR = 1<<4;
+        /// Lower left
+        const FIVE = 1<<5;
+        /// Lower right
+        const SIX = 1<<6;
+    }
+}
+
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
 pub enum BlockAlpha {
     /// 100%
@@ -167,9 +184,18 @@ pub enum BlockKey {
     Full(BlockAlpha),
     /// A combination of quadrants
     Quadrants(Quadrant),
+    /// A combination of sextants
+    Sextants(Sextant),
 }
 
 impl BlockKey {
+    pub fn filter_out_synthetic(glyphs: &mut Vec<char>) {
+        let config = config::configuration();
+        if config.custom_block_glyphs {
+            glyphs.retain(|&c| Self::from_char(c).is_none());
+        }
+    }
+
     pub fn from_char(c: char) -> Option<Self> {
         let c = c as u32;
         Some(match c {
@@ -205,6 +231,84 @@ impl BlockKey {
             0x259f => Self::Quadrants(
                 Quadrant::UPPER_RIGHT | Quadrant::LOWER_LEFT | Quadrant::LOWER_RIGHT,
             ),
+            0x1fb00 => Self::Sextants(Sextant::ONE),
+            0x1fb01 => Self::Sextants(Sextant::TWO),
+            0x1fb02 => Self::Sextants(Sextant::ONE | Sextant::TWO),
+            0x1fb03 => Self::Sextants(Sextant::THREE),
+            0x1fb04 => Self::Sextants(Sextant::ONE | Sextant::THREE),
+            0x1fb05 => Self::Sextants(Sextant::TWO | Sextant::THREE),
+            0x1fb06 => Self::Sextants(Sextant::TWO | Sextant::TWO | Sextant::THREE),
+            0x1fb07 => Self::Sextants(Sextant::FOUR),
+            0x1fb08 => Self::Sextants(Sextant::ONE | Sextant::FOUR),
+            0x1fb09 => Self::Sextants(Sextant::TWO | Sextant::FOUR),
+            0x1fb0a => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::FOUR),
+            0x1fb0b => Self::Sextants(Sextant::THREE | Sextant::FOUR),
+            0x1fb0c => Self::Sextants(Sextant::ONE | Sextant::THREE | Sextant::FOUR),
+            0x1fb0d => Self::Sextants(Sextant::TWO | Sextant::THREE | Sextant::FOUR),
+            0x1fb0e => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::THREE | Sextant::FOUR),
+            0x1fb0f => Self::Sextants(Sextant::FIVE),
+            0x1fb10 => Self::Sextants(Sextant::ONE | Sextant::FIVE),
+            0x1fb11 => Self::Sextants(Sextant::TWO | Sextant::FIVE),
+            0x1fb12 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::FIVE),
+            0x1fb13 => Self::Sextants(Sextant::THREE | Sextant::FIVE),
+            0x1fb14 => Self::Sextants(Sextant::TWO | Sextant::THREE | Sextant::FIVE),
+            0x1fb15 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::THREE | Sextant::FIVE),
+            0x1fb16 => Self::Sextants(Sextant::FOUR | Sextant::FIVE),
+            0x1fb17 => Self::Sextants(Sextant::ONE | Sextant::FOUR | Sextant::FIVE),
+            0x1fb18 => Self::Sextants(Sextant::TWO | Sextant::FOUR | Sextant::FIVE),
+            0x1fb19 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::FOUR | Sextant::FIVE),
+            0x1fb1a => Self::Sextants(Sextant::THREE | Sextant::FOUR | Sextant::FIVE),
+            0x1fb1b => {
+                Self::Sextants(Sextant::ONE | Sextant::THREE | Sextant::FOUR | Sextant::FIVE)
+            }
+            0x1fb1c => {
+                Self::Sextants(Sextant::TWO | Sextant::THREE | Sextant::FOUR | Sextant::FIVE)
+            }
+            0x1fb1d => Self::Sextants(
+                Sextant::ONE | Sextant::TWO | Sextant::THREE | Sextant::FOUR | Sextant::FIVE,
+            ),
+            0x1fb1e => Self::Sextants(Sextant::SIX),
+            0x1fb1f => Self::Sextants(Sextant::ONE | Sextant::SIX),
+            0x1fb20 => Self::Sextants(Sextant::TWO | Sextant::SIX),
+            0x1fb21 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::SIX),
+            0x1fb22 => Self::Sextants(Sextant::THREE | Sextant::SIX),
+            0x1fb23 => Self::Sextants(Sextant::ONE | Sextant::THREE | Sextant::SIX),
+            0x1fb24 => Self::Sextants(Sextant::TWO | Sextant::THREE | Sextant::SIX),
+            0x1fb25 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::THREE | Sextant::SIX),
+            0x1fb26 => Self::Sextants(Sextant::FOUR | Sextant::SIX),
+            0x1fb27 => Self::Sextants(Sextant::ONE | Sextant::FOUR | Sextant::SIX),
+            0x1fb28 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::FOUR | Sextant::SIX),
+            0x1fb29 => Self::Sextants(Sextant::THREE | Sextant::FOUR | Sextant::SIX),
+            0x1fb2a => Self::Sextants(Sextant::ONE | Sextant::THREE | Sextant::FOUR | Sextant::SIX),
+            0x1fb2b => Self::Sextants(Sextant::TWO | Sextant::THREE | Sextant::FOUR | Sextant::SIX),
+            0x1fb2c => Self::Sextants(
+                Sextant::ONE | Sextant::TWO | Sextant::THREE | Sextant::FOUR | Sextant::SIX,
+            ),
+            0x1fb2d => Self::Sextants(Sextant::FIVE | Sextant::SIX),
+            0x1fb2e => Self::Sextants(Sextant::ONE | Sextant::FIVE | Sextant::SIX),
+            0x1fb2f => Self::Sextants(Sextant::TWO | Sextant::FIVE | Sextant::SIX),
+            0x1fb30 => Self::Sextants(Sextant::ONE | Sextant::TWO | Sextant::FIVE | Sextant::SIX),
+            0x1fb31 => Self::Sextants(Sextant::THREE | Sextant::FIVE | Sextant::SIX),
+            0x1fb32 => Self::Sextants(Sextant::ONE | Sextant::THREE | Sextant::FIVE | Sextant::SIX),
+            0x1fb33 => Self::Sextants(Sextant::TWO | Sextant::THREE | Sextant::FIVE | Sextant::SIX),
+            0x1fb34 => Self::Sextants(
+                Sextant::ONE | Sextant::TWO | Sextant::THREE | Sextant::FIVE | Sextant::SIX,
+            ),
+            0x1fb35 => Self::Sextants(Sextant::FOUR | Sextant::FIVE | Sextant::SIX),
+            0x1fb36 => Self::Sextants(Sextant::ONE | Sextant::FOUR | Sextant::FIVE | Sextant::SIX),
+            0x1fb37 => Self::Sextants(Sextant::TWO | Sextant::FOUR | Sextant::FIVE | Sextant::SIX),
+            0x1fb38 => Self::Sextants(
+                Sextant::ONE | Sextant::TWO | Sextant::FOUR | Sextant::FIVE | Sextant::SIX,
+            ),
+            0x1fb39 => {
+                Self::Sextants(Sextant::THREE | Sextant::FOUR | Sextant::FIVE | Sextant::SIX)
+            }
+            0x1fb3a => Self::Sextants(
+                Sextant::ONE | Sextant::THREE | Sextant::FOUR | Sextant::FIVE | Sextant::SIX,
+            ),
+            0x1fb3b => Self::Sextants(
+                Sextant::TWO | Sextant::THREE | Sextant::FOUR | Sextant::FIVE | Sextant::SIX,
+            ),
             _ => return None,
         })
     }
@@ -824,6 +928,43 @@ impl<T: Texture2d> GlyphCache<T> {
                     draw_quad(&mut buffer, scale(x_half)..width, scale(y_half)..height);
                 }
             }
+            BlockKey::Sextants(s) => {
+                let y_third = self.metrics.cell_size.height as f32 / 3.;
+                let x_half = self.metrics.cell_size.width as f32 / 2.;
+                let width = self.metrics.cell_size.width as usize;
+                let height = self.metrics.cell_size.height as usize;
+
+                if s.contains(Sextant::ONE) {
+                    draw_quad(&mut buffer, 0..scale(x_half), 0..scale(y_third));
+                }
+                if s.contains(Sextant::TWO) {
+                    draw_quad(&mut buffer, scale(x_half)..width, 0..scale(y_third));
+                }
+                if s.contains(Sextant::THREE) {
+                    draw_quad(
+                        &mut buffer,
+                        0..scale(x_half),
+                        scale(y_third)..scale(y_third * 2.),
+                    );
+                }
+                if s.contains(Sextant::FOUR) {
+                    draw_quad(
+                        &mut buffer,
+                        scale(x_half)..width,
+                        scale(y_third)..scale(y_third * 2.),
+                    );
+                }
+                if s.contains(Sextant::FIVE) {
+                    draw_quad(&mut buffer, 0..scale(x_half), scale(y_third * 2.)..height);
+                }
+                if s.contains(Sextant::SIX) {
+                    draw_quad(
+                        &mut buffer,
+                        scale(x_half)..width,
+                        scale(y_third * 2.)..height,
+                    );
+                }
+            }
         }
 
         /*
diff --git a/wezterm-gui/src/termwindow/render.rs b/wezterm-gui/src/termwindow/render.rs
index 879af7052..b4524fec7 100644
--- a/wezterm-gui/src/termwindow/render.rs
+++ b/wezterm-gui/src/termwindow/render.rs
@@ -540,9 +540,11 @@ impl super::TermWindow {
                 None => {
                     let font = self.fonts.resolve_font(style)?;
                     let window = self.window.as_ref().unwrap().clone();
-                    match font.shape(text, move || {
-                        window.notify(TermWindowNotif::InvalidateShapeCache)
-                    }) {
+                    match font.shape(
+                        text,
+                        move || window.notify(TermWindowNotif::InvalidateShapeCache),
+                        BlockKey::filter_out_synthetic,
+                    ) {
                         Ok(info) => {
                             let line = Line::from_text(&text, &CellAttributes::default());
                             let clusters = line.cluster();
@@ -832,9 +834,11 @@ impl super::TermWindow {
                     None => {
                         let font = self.fonts.resolve_font(style)?;
                         let window = self.window.as_ref().unwrap().clone();
-                        match font.shape(&cluster.text, move || {
-                            window.notify(TermWindowNotif::InvalidateShapeCache)
-                        }) {
+                        match font.shape(
+                            &cluster.text,
+                            move || window.notify(TermWindowNotif::InvalidateShapeCache),
+                            BlockKey::filter_out_synthetic,
+                        ) {
                             Ok(info) => {
                                 let glyphs = self.glyph_infos_to_glyphs(
                                     cluster,