diff --git a/changelog.txt b/changelog.txt
index 1acee4c..99c520d 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -56,6 +56,7 @@
 * Fix bad default wood trapdoor side
 * Cut excess detail from both default trapdoor side images
 * Fixed bad prefab concrete door images, and remove obsolete images
+* Added default obsidian block
 
 2018-11-11: Rename and consolidate cement and concrete images. Use 
 basic_materials filenames, make cement darker. Rename other 
diff --git a/default_obsidian_block.jpg b/default_obsidian_block.jpg
new file mode 100644
index 0000000..cdb3bf7
Binary files /dev/null and b/default_obsidian_block.jpg differ