diff --git a/src/data/guestbook.json b/src/data/guestbook.json
index 8b74999..7c2a9e8 100644
--- a/src/data/guestbook.json
+++ b/src/data/guestbook.json
@@ -125,5 +125,13 @@
     "githubUsername": "HeadstartAI",
     "id": "star-icon",
     "message": "First one to sign the guestbook! I created this star icon to light up your day. Hope you like it!"
+  },
+  {
+    "componentName": "DiamondIcon",
+    "contributor": "lewisGRJ",
+    "date": "2026-02-13T12:00:00.000Z",
+    "githubUsername": "lewisGRJ",
+    "id": "diamond-icon",
+    "message": "Hey there! Dropping a little sparkle in the guestbook. Happy to be here!"
   }
 ]
diff --git a/src/icons/DiamondIcon.tsx b/src/icons/DiamondIcon.tsx
new file mode 100644
index 0000000..2a8fc40
--- /dev/null
+++ b/src/icons/DiamondIcon.tsx
@@ -0,0 +1,23 @@
+import React from "react";
+import { IconProps } from "../types";
+
+const DiamondIcon: React.FC<IconProps> = ({ color = "currentColor", ...props }) => {
+  return (
+    <svg
+      xmlns="http://www.w3.org/2000/svg"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke={color}
+      strokeWidth="1.5"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      {...props}
+    >
+      <path d="M12 2l9 7.5L12 22 3 9.5z" />
+      <path d="M3 9.5h18" />
+      <path d="M12 2l-4.5 7.5L12 22l4.5-12.5z" />
+    </svg>
+  );
+};
+
+export default DiamondIcon;
diff --git a/src/icons/index.ts b/src/icons/index.ts
index 3ef5b06..c4da225 100644
--- a/src/icons/index.ts
+++ b/src/icons/index.ts
@@ -15,6 +15,7 @@ import SpiralIcon from './SpiralIcon';
 import FireworksIcon from './FireworksIcon';
 import PaperAirplaneIcon from './PaperAirplaneIcon';
 import RocketIcon from './RocketIcon';
+import DiamondIcon from './DiamondIcon';
 
 const iconComponents: Record<string, React.FC<any>> = {
   StarIcon,
@@ -32,7 +33,8 @@ const iconComponents: Record<string, React.FC<any>> = {
   SpiralIcon,
   FireworksIcon,
   PaperAirplaneIcon,
-  RocketIcon
+  RocketIcon,
+  DiamondIcon
 };
 
 export default iconComponents;