Quick answer: Jewel is at a hut in the Village of Lu, a short walk down from the Place of Awakening bell. Talk to her and pick “Polish accessories,” which costs a Tainted Crystal Shard and Remnant Dust.
Where to find Jewel
Jewel lives in the Village of Lu, which you visit during Chapter 1’s AGAINST THE FLOW story quest. Her hut is about 200 metres from the Place of Awakening bell.
Once the scene ends, Jewel stays at the hut. Talking to her brings up two options, “About the faint weeping” and “Polish accessories”.
Who Jewel is
Jewel is one of Lady Inanis’s artisan sisters. She greets Soul as if she had expected him to arrive. Forge, who handles weapon upgrades, is Jewel’s triplet and was born a moment before her. Jewel recognizes Soul’s broken pipa as the instrument Lady Inanis made for the Chord. She tells him to bring all the missing pieces to Myst, her second sister, for repairs.
When Soul asks about the faint weeping he hears, Jewel explains that the Chord is Lady Inanis’s daughter. The Chord lives in a puppet body and is accomplished in music and Phantom Arts; Jewel thinks the weeping could be her call for help. If you select the option to polish accessories, Jewel says trinkets lost throughout the Wulin can be refined further by her.
How to polish accessories with Jewel
Before you head over, make sure you’re carrying the crafting material and the Remnant Dust. The polish won’t go through without both in hand.
The MAIN WEAPONS tab works the same way weapon upgrades do at a bell. Taking the Sanguine Twin from level 5 to the next level raises Damage from 280 to 300 and Guard Break from 140 to 150. That upgrade costs 6 Twinned Metal, 3 Solvent and 2,970 Remnant Dust.
Polish costs and effects
| Accessory | Before | After polishing | Cost |
|---|---|---|---|
 Preservation Jar | “Reduces poison damage taken by 50%.” | “Reduces poison damage taken by 80%.” | 1 Tainted Crystal Shard + 8,096 Remnant Dust |
 Resonance Talisman | “Increases Sha-Chi by 15%.” | “Increases Sha-Chi by 25%.” | 1 Tainted Crystal Shard + 8,096 Remnant Dust |
 Jewel’s Knot | “Increases HP by 15%.” | “Increases HP by 25%.” | 1 Tainted Crystal Shard + 9,152 Remnant Dust |
The first polish on an accessory uses a Tainted Crystal Shard, whose item text reads “Required to polish an accessory for the first time.” A second polish calls for a different material, the Refined Indigo Crystal: “Required to polish an accessory for the second time.”
You can buy the Tainted Crystal Shard from Quick Hand Zhang for 7,440 Remnant Dust, or find one in the world.
Jewel’s Knot in the chest beside Jewel’s hut
A few metres from her table, a red-and-gold chest is positioned by Jewel’s hut. It contains Jewel’s Knot, a Defensive accessory with the effect “Increases HP by 15%.” Its description says Second Sister Myst provided the threads, Eldest Sister Forge supplied the metal loops, and Jewel made the knots; the three sisters gave it to Master Soul.
Opening the chest prompts “Equip the new Accessory now?” You have three accessory slots, and the accessories list shows what else fits them.
