diff --git a/Sources/SwiftSCAD/Operations/Duplication/Clone.swift b/Sources/SwiftSCAD/Operations/Duplication/Clone.swift
new file mode 100644
index 0000000..7032acb
--- /dev/null
+++ b/Sources/SwiftSCAD/Operations/Duplication/Clone.swift
@@ -0,0 +1,13 @@
+import Foundation
+
+public extension Geometry2D {
+    func cloned(@UnionBuilder2D _ transform: (any Geometry2D) -> any Geometry2D) -> any Geometry2D {
+        adding(transform(self))
+    }
+}
+
+public extension Geometry3D {
+    func cloned(@UnionBuilder3D _ transform: (any Geometry3D) -> any Geometry3D) -> any Geometry3D {
+        adding(transform(self))
+    }
+}