diff --git a/Makefile b/Makefile
index 9e5db47..9bbd894 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,10 @@
 
 .PHONY: doit
 
-all:	yunzi yunzi-hard antique antique-hard basic bathroom jade jade-hard sakura shell-slate shell-slate-hard yunzi yunzi-hard
+all:	yunzi yunzi-hard agate antique antique-hard basic bathroom jade jade-hard sakura shell-slate shell-slate-hard yunzi yunzi-hard
+
+agate: doit
+	$(MAKE) -C $@ NAME=$@
 
 antique: doit
 	$(MAKE) -C $@ NAME=$@-soft
diff --git a/README.md b/README.md
index 8a4ec10..50cc3ca 100644
--- a/README.md
+++ b/README.md
@@ -9,19 +9,20 @@ under 'Preferences' > 'Themes' > 'Install Theme...'.
 
 ## Screenshots
 
-| Theme                                        | Screenshot                                     |
-| -------------------------------------------- | ---------------------------------------------- |
-| [antique](antique)                           | ![Screenshot](antique/Screenshot.jpg)          |
-| [antique](antique-hard) (hard light)         | ![Screenshot](antique-hard/Screenshot.jpg)     |
-| [basic](basic)                               | ![Screenshot](basic/Screenshot.jpg)            |
-| [bathroom](bathroom)                         | ![Screenshot](bathroom/Screenshot.jpg)         |
-| [jade](jade)                                 | ![Screenshot](jade/Screenshot.jpg)             |
-| [jade](jade-hard) (hard light)               | ![Screenshot](jade-hard/Screenshot.jpg)        |
-| [sakura](sakura)                             | ![Screenshot](sakura/Screenshot.jpg)           |
-| [shell-slate](shell-slate)                   | ![Screenshot](shell-slate/Screenshot.jpg)      |
-| [shell-slate](shell-slate-hard) (hard light) | ![Screenshot](shell-slate-hard/Screenshot.jpg) |
-| [yunzi](yunzi)                               | ![Screenshot](yunzi/Screenshot.jpg)            |
-| [yunzi](yunzi-hard) (hard light)             | ![Screenshot](yunzi-hard/Screenshot.jpg)       |
+| Theme                                              | Screenshot                                     |
+| -------------------------------------------------- | ---------------------------------------------- |
+| [Agate](agate)                                     | ![Screenshot](agate/Screenshot.jpg)            |
+| [Antique](antique)                                 | ![Screenshot](antique/Screenshot.jpg)          |
+| [Antique](antique-hard) (hard light)               | ![Screenshot](antique-hard/Screenshot.jpg)     |
+| [Basic](basic)                                     | ![Screenshot](basic/Screenshot.jpg)            |
+| [Bathroom](bathroom)                               | ![Screenshot](bathroom/Screenshot.jpg)         |
+| [Jade](jade)                                       | ![Screenshot](jade/Screenshot.jpg)             |
+| [Jade](jade-hard) (hard light)                     | ![Screenshot](jade-hard/Screenshot.jpg)        |
+| [Sakura](sakura)                                   | ![Screenshot](sakura/Screenshot.jpg)           |
+| [Clamshell & Slate](shell-slate)                   | ![Screenshot](shell-slate/Screenshot.jpg)      |
+| [Clamshell & Slate](shell-slate-hard) (hard light) | ![Screenshot](shell-slate-hard/Screenshot.jpg) |
+| [Yunzi](yunzi)                                     | ![Screenshot](yunzi/Screenshot.jpg)            |
+| [Yunzi](yunzi-hard) (hard light)                   | ![Screenshot](yunzi-hard/Screenshot.jpg)       |
 
 ## Resources
 
diff --git a/agate/Makefile b/agate/Makefile
new file mode 100644
index 0000000..d64d60f
--- /dev/null
+++ b/agate/Makefile
@@ -0,0 +1,4 @@
+
+include ../Makefile.common
+
+# vim: noet sw=8
diff --git a/agate/README.md b/agate/README.md
new file mode 100644
index 0000000..e047c67
--- /dev/null
+++ b/agate/README.md
@@ -0,0 +1,26 @@
+# Agate Theme for Sabaki
+
+A theme with agate stones and a kaya board for [Sabaki](http://sabaki.yichuanshen.de/),
+Rendered in [Blender](https://www.blender.org/).
+
+![Screenshot](Screenshot.jpg)
+
+## Installation
+
+[Download](https://github.com/billhails/SabakiThemes/releases) the theme file and install it directly inside Sabaki
+under 'Preferences' > 'Themes' > 'Install Theme...'.
+
+## Build
+
+To create a Sabaki theme archive, install dependencies using npm, then run the build script:
+
+~~~
+npm install
+npm run build
+~~~
+
+This will create `agate.sabakitheme.asar`.
+
+## License
+
+Everything is released under [public domain](http://creativecommons.org/publicdomain/zero/1.0/).
diff --git a/agate/Screenshot.png b/agate/Screenshot.png
new file mode 100644
index 0000000..0402c90
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diff --git a/agate/package.json b/agate/package.json
new file mode 100644
index 0000000..9136fd2
--- /dev/null
+++ b/agate/package.json
@@ -0,0 +1,8 @@
+{
+  "devDependencies": {
+    "asar": "^0.13.0"
+  },
+  "scripts": {
+    "build": "asar pack ./theme ./agate.sabakitheme.asar"
+  }
+}
diff --git a/agate/theme/images/Background.png b/agate/theme/images/Background.png
new file mode 100644
index 0000000..604e61a
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diff --git a/agate/theme/images/Black.png b/agate/theme/images/Black.png
new file mode 100644
index 0000000..d87a1c3
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diff --git a/agate/theme/images/Board.png b/agate/theme/images/Board.png
new file mode 100644
index 0000000..51140ab
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diff --git a/agate/theme/images/White.png b/agate/theme/images/White.png
new file mode 100644
index 0000000..b90bdb8
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diff --git a/agate/theme/package.json b/agate/theme/package.json
new file mode 100644
index 0000000..1893a08
--- /dev/null
+++ b/agate/theme/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "Agate",
+  "version": "0.1.0",
+  "description": "A theme with agate stones for Sabaki",
+  "author": "Bill Hails",
+  "license": "CC0-1.0",
+  "homepage": "https://github.com/billhails/SabakiThemes",
+  "main": "styles.css"
+}
diff --git a/agate/theme/styles.css b/agate/theme/styles.css
new file mode 100644
index 0000000..bab5c82
--- /dev/null
+++ b/agate/theme/styles.css
@@ -0,0 +1,45 @@
+.shudan-goban {
+    --shudan-board-border-width: 0;
+    --shudan-board-foreground-color: #222;
+
+    --shudan-black-background-color: #0E0F0E;
+    --shudan-black-foreground-color: #eee;
+
+    --shudan-white-background-color: #EBEBEB;
+    --shudan-white-foreground-color: #666;
+}
+
+.shudan-goban-image {
+  background-image: url('images/Board.png');
+}
+
+.shudan-stone-image.shudan-sign_1 {
+    background-image: url('images/Black.png');
+}
+
+.shudan-stone-image.shudan-sign_-1 {
+    background-image: url('images/White.png');
+}
+
+.shudan-vertex.shudan-sign_1 .shudan-shadow {
+    background: #392f19;
+    filter: drop-shadow(0.106em 0.106em 0.06em rgb(0 0 0 / 70%));
+}
+
+.shudan-vertex.shudan-sign_-1 .shudan-shadow {
+    background: #806b3f;
+    filter: drop-shadow(0.106em 0.106em 0.06em rgb(0 0 0 / 30%));
+}
+
+.shudan-vertex:not(.shudan-sign_0) .shudan-shadow {
+    box-shadow: 0 0 0;
+}
+
+rect.shudan-gridline.shudan-horizontal, rect.shudan-gridline.shudan-vertical {
+    stroke-width: 0.02em;
+    stroke: var(--shudan-board-foreground-color);
+}
+
+main {
+    background: #f0f0f0 url('images/Background.png') left top;
+}
diff --git a/blender/SabakiThemes.blend b/blender/SabakiThemes.blend
index 598047e..6370ba8 100644
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diff --git a/blender/previews/AgatePreview.png b/blender/previews/AgatePreview.png
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index 0000000..957244b
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