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<html lang="en-US">
<head>
<style>
#point:after{
content:"\02756";
}
</style>
</head>
<body>
<p>Black Diamond Minus White X using Hexa Decimal: ❖</p>
<p>Black Diamond Minus White X using HTML Code: ❖</p>
<p id="point">Black Diamond Minus White X using CSS Entity: </p>
</body>
</html>