diff --git a/default/default_coal_lump.png b/default/default_coal_lump.png
index 09cac52..b9d46fd 100644
Binary files a/default/default_coal_lump.png and b/default/default_coal_lump.png differ
diff --git a/default/default_copper_lump.png b/default/default_copper_lump.png
index cb074b5..b6f7ba6 100644
Binary files a/default/default_copper_lump.png and b/default/default_copper_lump.png differ
diff --git a/default/default_gold_lump.png b/default/default_gold_lump.png
index ef9b8db..bd27e58 100644
Binary files a/default/default_gold_lump.png and b/default/default_gold_lump.png differ
diff --git a/default/default_iron_lump.png b/default/default_iron_lump.png
index 40e9fb5..81ee32c 100644
Binary files a/default/default_iron_lump.png and b/default/default_iron_lump.png differ
diff --git a/default/default_tin_lump.png b/default/default_tin_lump.png
index d4b3ee5..8bbe56c 100644
Binary files a/default/default_tin_lump.png and b/default/default_tin_lump.png differ