diff --git a/docs/users/db.md b/docs/users/db.md
index 5be3dc5..26e822f 100644
--- a/docs/users/db.md
+++ b/docs/users/db.md
@@ -9,6 +9,13 @@ Note that all databases,
 i.e., for all different grain types ("sic", ...)
 can be managed with this tool.
 
+## Currently impelmented databases
+
+The following grain types are currently implemented:
+
+- `"sic"`: Silicon carbide
+- `"gra"`: Graphite
+
 ## Background
 
 In order to be able to update the database without updating the package,
diff --git a/tests/data_files/db.json b/tests/data_files/db.json
index eb42b1e..be3af87 100644
--- a/tests/data_files/db.json
+++ b/tests/data_files/db.json
@@ -58,7 +58,7 @@
             }
         ]
     },
-    "graphites": {
+    "gra": {
         "db_name": "Graphite",
         "versions":[
             {
diff --git a/tests/test_db/conftest.py b/tests/test_db/conftest.py
index 9d132a6..7e0c571 100644
--- a/tests/test_db/conftest.py
+++ b/tests/test_db/conftest.py
@@ -23,7 +23,7 @@ def conf_files(tmpdir_home, data_files_dir) -> Path:
 @pytest.fixture
 def current_file(tmpdir_home) -> Tuple[Path, dict]:
     """Create a fake `current.json` file and write into the right location."""
-    curr_to_write = {"sic": "test.csv", "graphites": "test-graphites.csv"}
+    curr_to_write = {"sic": "test.csv", "gra": "test-graphites.csv"}
     curr_ret = {k: Path(v) for k, v in curr_to_write.items()}
 
     with open(tmpdir_home.joinpath("current.json"), "w") as fout:
diff --git a/tests/test_db/test_config.py b/tests/test_db/test_config.py
index 1dce8c8..70303a3 100644
--- a/tests/test_db/test_config.py
+++ b/tests/test_db/test_config.py
@@ -18,7 +18,7 @@ def test_databases_conf_not_found():
 def test_databases_dbs(conf_files):
     """Assert that the database reader returns all databases when asked."""
     db = DataBases()
-    assert db.dbs == ["sic", "graphites"]
+    assert db.dbs == ["sic", "gra"]
 
 
 def test_databases_urls_all(conf_files):