Speculation on what the Crown Jewel of Hachinosu could be?

With the latest chapter spoiler, we now know that:
- Rocks was a king of a kingdom recognized by the world government.
- After killing an admiral, he became a wanted man and his kingdom, Hachinosu, became a rogue nation.
- At some point he became the father of Teach.

Teach is currently 40 years old. The God Valley incident happened 38 years ago so that would make him 2 years old at that time. Rocks could still remain the King of Hachinosu and that would make Teach the crowned prince and his mother, the Queen of Hachinosu. However, Whitebeard didn't recognize Teach when he asked to join the crew so he must have thought that the child of his former captain must have died or his existence may have been kept a secret from his crew members.

The God Knights stole an important treasure, "a crown jewel of Hachinosu", prior to the God Valley incident. This treasure must be of a very high significance to Rocks that he will do anything to get it back. The God Valley incident was a rare occurrence where many of the celestial dragons and potentially all of the God's Knights were present on a relatively unprotected island. After receiving intel of the hunting game on God Valley, Rocks quickly arrive with his crew to wage war on the CD + GK with the hope of retrieving the stolen treasure. The movement of Rocks attracted Roger who in turn attracted Garp. Due to some unforeseen incidents, Rocks may have learned that the treasure must have been destroyed or lost, which cost him to go crazy and attack innocent bystanders. This resulted in both Roger and Garp having to team up to stop him.

The known outcomes of the God Valley incident:
- The Rocks Pirates disbanded. Big Mom and Kaido left with the Dragon Fruit. Whitebeard was scarred by Garling but possibly left with the Phoenix Fruit.
- Garling was named the Champion of God Valley.
- Garp became known as the Hero of the Marines.
- Roger took a treasure chest from the island, which later turned out to contain 1-year old baby Shanks (son of Garling).

My speculation is that the "crown jewel of Hachinosu" is not an item, but a person of significant importance to Rocks possibly a red-haired queen of Hachinosu, the wife of Rocks. The queen who has just given birth to a boy named Teach (2 years prior to the incident). The queen was kidnapped by the God's Knight to be made a wife to Garling. It was possibly revealed to Rocks at the God Valley incident that his wife was dead maybe from giving birth to twins (Shamrock and Shanks) who were both 1 year old at the time. The sudden revelation made him gone berserk and killed innocent bystanders and that was why both Roger and Garp had to step in. This will be significant as through some twist of fate, Teach and Shanks (who was called Child of Destiny by Gaban) will be revealed to be half brothers.

TLDR: The Crown Jewel of Hachinosu that was stolen by the God Knights was the Red-haired Queen of Hachinosu (wife of Rocks and mother of Teach) to be made the wife of Garling who later became the mother of Shamrock and Shanks, but was revealed to have passed away at the God Valley incident.