This paper covers ways to identify synthesized gemstones and includes detailed images illustrating defects in synthesized gemstones.

This paper discusses different types of gemstones as well as methods utilized in synthesizing gemstones.

A video describing s-p mixing in molecular orbitals.

https://www.youtube.com/watch?v=r3U2kT3rHI4

A video interpreting the constructed molecular orbital for CO.

https://www.youtube.com/watch?v=PE9CIKSLvrI

A resource to help practice drawing and filling molecular orbitals.

https://www.youtube.com/watch?v=-A5Y-eZHTQE

A brief video from the Oxford University Press on s-p mixing.

https://www.youtube.com/watch?v=qoYEOMMJCXc

A full lecture from UC Irvine on molecular orbitals.

https://www.youtube.com/watch?v=Zre4RrOYfjg

A resource for reviewing bond and bond order in molecular orbitals.

http://chemwiki.ucdavis.edu/?title=Textbook_Maps/General_Chemistry_Textbook_Maps/Map:_Chemistry_%26_Chemical_Reactivity_%28Kotz_et_al.%29/09:_Bonding_and_Molecular_Structure:_Orbital_Hybridization_and_Molecular_Orbitals/9.2:_Molecular_Orbital_Theory

Two great sources for molecular orbital overview and review.

http://chemwiki.ucdavis.edu/Textbook_Maps/General_Chemistry_Textbook_Maps/Map%3A_Chemistry_%28OpenSTAX%29/08%3A_Advanced_Theories_of_Covalent_Bonding/8.4%3A_Molecular_Orbital_Theory

http://chemwiki.ucdavis.edu/Textbook_Maps/General_Chemistry_Textbook_Maps/Map%3A_General_Chemistry_%28Petrucci_et_al.%29/11%3A_Chemical_Bonding_II%3A_Additional_Aspects/11.5%3A_Molecular_Orbital_Theory

This chart from Washington University in St. Louis is a great resource for additional help with molecular geometries, which is critical in assigning the correct point groups to molecules.