Identity Help : I have a stone that checks as diamond, could this still be faulty?

I found this on the side of the road. It has flat cracks in it too. What are the chances that it really is diamond

How Can You Tell If a Diamond is Real? - Brilliant Earth

Any of these diamonds look fake? Ring under UV light. : r/Gemstones

Identity Help : Diamond??

Identity Help : Diamond??

Identity Help : Diamond??

How King Charles' diamonds reveal Earth's deep secrets

Unique 3 Stone Marquise & Hearts Diamond Engagement Ring, Three Stone Unique Engagement Ring, Cluster Diamond Ring, Marquise Wedding Ring

Conflict diamonds may not be on the radar, but they're still a worry for some

Inclusions as Nature's Signature: The Unique Identity of Sapphires

How to Spot Fake Diamonds

Identity Help : Diamonds Wisconsin

Do Lab Diamonds Test As Real Diamonds: Three Tests To Know, 47% OFF